7 Signs Rasboras Are Getting Along Well

Do you enjoy watching your rasboras swim gracefully but notice subtle differences in their interactions within the tank? Observing their behavior can reveal how well these fish are coexisting and forming bonds. Understanding their social cues is important.

Rasboras display harmonious behavior through synchronized swimming, minimal aggression, and frequent gentle interactions. Healthy schooling patterns, sharing of territory, and active feeding without dominance disputes indicate a positive social environment and overall well-being among the group.

Recognizing these signs early ensures a peaceful tank and supports the long-term health of your rasboras. Observing their behavior closely can enhance your care routine.

Synchronized Swimming

Watching rasboras move together in the tank is one of the clearest indicators of harmony. When the fish swim in unison, it shows they are comfortable and feel safe with each other. This coordinated movement reduces stress and allows each fish to navigate the tank without fear of sudden attacks. Synchronized swimming also helps them find food efficiently and respond to changes in the environment, like light or movement. Over time, this behavior can strengthen their social bonds, making them less likely to fight over territory. It is common to see rasboras of the same species gliding side by side, turning and changing directions almost simultaneously. This behavior is instinctive but also reflects the tank’s overall conditions, including water quality, temperature, and available space. A tank that encourages smooth swimming will help maintain a calm, thriving community of fish, which is essential for their overall health and longevity.

Synchronized swimming reduces stress and promotes confidence in the tank. It signals that the fish feel secure in their environment.

Regular observation of these swimming patterns can help you identify any disruptions. If one or two fish consistently lag or dart aggressively, it may indicate minor tensions or environmental stressors. Ensuring enough open space and maintaining proper water parameters can enhance their natural swimming rhythm. Over time, even small tanks can support this behavior if the environment is well-organized and safe. Feeding routines also play a role, as predictable feeding times encourage the group to move together without competition. Overall, synchronized swimming not only improves social interaction but also contributes to physical exercise and mental stimulation, keeping the rasboras active and healthy. Maintaining this pattern requires attention to the tank setup, consistent care, and monitoring changes in behavior that might signal discomfort. By prioritizing these aspects, you create a stable and peaceful habitat for your fish.

Gentle Interactions

Gentle interactions among rasboras are a key sign of a well-adjusted group. They often swim close to each other, touch lightly, and avoid aggressive chasing.

Observing these subtle behaviors indicates trust and comfort within the tank. When the fish calmly interact, it shows the environment supports peaceful coexistence.

Gentle interactions are essential for social cohesion. Rasboras that touch or swim alongside one another without signs of aggression display strong social bonds. These behaviors reduce stress, improve feeding efficiency, and create a calmer tank atmosphere. Aggressive chasing, nipping, or sudden darting usually points to tension, overcrowding, or territorial disputes, which can affect their health. Maintaining proper tank size, hiding spots, and consistent feeding schedules supports these peaceful exchanges. Over time, gentle interactions encourage schooling, making the group feel secure. These behaviors also allow younger or smaller fish to thrive, as they are not constantly intimidated. A tank that fosters calm, gentle interaction benefits all its inhabitants, helping the fish live longer, healthier lives while maintaining a visually pleasing, active display.

Active Feeding

Rasboras that feed actively together show they feel safe and confident in their environment. Calm, synchronized feeding without competition indicates a healthy social dynamic within the tank.

Active feeding is a strong sign that the group is comfortable. When all fish approach food without fear, it demonstrates trust in one another. Rasboras will often dart in together, nibbling carefully and avoiding aggressive behavior. This coordinated feeding reduces stress and ensures every fish gets adequate nutrition. If a few fish dominate meals or chase others away, it may indicate minor tension or hierarchy disputes. A well-fed group is generally calmer and more likely to display positive behaviors such as schooling and gentle interaction. Feeding routines that are predictable and consistent encourage all fish to participate and thrive.

Observing feeding times closely can reveal patterns in behavior. Rasboras that eat together without interruption often maintain better health and energy levels. Over time, this harmony supports growth, activity, and resilience to stress. Tank setup also impacts feeding behavior. Open areas combined with hiding spots allow timid fish to join without fear, fostering inclusivity. Proper water parameters and high-quality food further support active feeding, keeping the group balanced and content. Active feeding ultimately reflects both social and environmental well-being.

Minimal Aggression

Minimal aggression is a key sign that rasboras are getting along well. Low levels of chasing or nipping indicate a calm, stable community.

Rasboras that rarely display aggressive behaviors demonstrate a healthy social hierarchy. In a peaceful tank, each fish respects territory without constant dominance disputes. Aggression often occurs due to overcrowding, stress, or poor environmental conditions. A tank with ample space, plants, and hiding spots reduces tension. Even when minor disputes happen, they are brief and do not escalate. Minimal aggression supports better health, encourages schooling, and allows timid fish to feed and explore without fear. Consistency in care, regular monitoring, and maintaining proper water conditions help sustain this calm environment.

Observing aggression patterns provides insight into tank dynamics. Fish that interact calmly, with only occasional chasing, show they are comfortable. Establishing hiding spaces and visual barriers helps reduce conflict, allowing all fish to coexist peacefully. Overcrowding and improper tank conditions often trigger aggressive episodes, so careful planning of group size and environment is essential. Minimal aggression also enhances overall activity levels, as fish are not stressed or constantly fleeing. Monitoring behavior ensures early detection of any rising tension, allowing timely adjustments. Ultimately, a peaceful tank fosters health, well-being, and natural social interaction.

Consistent Schooling

Rasboras that maintain consistent schooling show they feel secure and connected with the group. Tight, coordinated movement indicates trust and reduces stress.

A group that schools consistently is less likely to experience conflicts. Fish that stick together move confidently, explore the tank safely, and respond quickly to changes in their environment.

Shared Territory

Rasboras that share territory without disputes reflect a balanced social structure. They move through the tank without defending specific areas aggressively, allowing all fish to access food, hiding spots, and open swimming space. This behavior shows respect for each other and promotes peaceful coexistence.

Calm Resting

Rasboras that rest calmly near each other without darting away show they feel safe. Calm resting periods are a sign of a secure and harmonious tank environment.

FAQ

How many rasboras should I keep together?
Rasboras are schooling fish and feel most comfortable in groups. Keeping at least six together is recommended for smaller tanks. Larger tanks can support bigger groups, which encourages natural behavior, reduces stress, and prevents aggression. A well-sized group also improves their swimming patterns and overall activity.

What signs indicate rasboras are stressed?
Stress in rasboras often appears as erratic swimming, hiding constantly, or refusing food. Faded coloration and increased aggression are also common indicators. Poor water quality, overcrowding, or sudden changes in temperature can trigger stress. Observing daily behavior helps detect these issues early and ensures timely intervention.

Can rasboras live with other fish?
Rasboras generally coexist well with other peaceful species of similar size. Avoid aggressive or very large fish, as they can intimidate or injure rasboras. Compatible tank mates include tetras, guppies, and other small schooling fish. Proper tank layout and hiding spaces reduce potential conflicts.

How do I encourage synchronized swimming?
Providing open swimming space and maintaining consistent feeding routines helps rasboras swim together. A calm environment with proper lighting, stable water parameters, and minimal disturbances promotes group cohesion. Over time, the fish will naturally synchronize their movements.

What causes aggression in a rasbora tank?
Aggression usually stems from overcrowding, lack of hiding spots, or dominance disputes. Temporary stress from poor water quality or sudden changes in the environment can also trigger aggressive behavior. Observing interactions and providing adequate space minimizes tension.

How often should I feed my rasboras?
Rasboras do best with small, frequent feedings, usually two to three times daily. Offer high-quality flakes, micro-pellets, or live foods in controlled amounts. Overfeeding can pollute the tank and harm water quality, while underfeeding affects growth and activity levels.

Why do rasboras school closely at times and scatter at others?
Schooling patterns can vary depending on mood, feeding, or environmental changes. Close schooling usually indicates security, while scattering may reflect curiosity or minor stress. Consistent water conditions and a stable environment help maintain predictable schooling behavior.

How important is tank size for rasboras?
Tank size is crucial for both social behavior and swimming activity. Small tanks can restrict movement and increase stress, while adequately sized tanks allow schooling, exploration, and peaceful interactions. A minimum of 20 gallons is recommended for a small group.

Can rasboras get along with different species of rasboras?
Different rasbora species can usually coexist if their temperaments and size are similar. Monitor interactions closely, as some species are slightly more territorial. Providing plants and hiding spots reduces potential conflicts and encourages natural behavior.

What environmental factors help rasboras thrive together?
Stable water parameters, moderate temperature, and clean conditions are essential. Plants, open swimming areas, and hiding spaces support peaceful coexistence. Consistent care routines, including feeding and water changes, maintain balance and reduce stress, promoting harmony in the tank.

How do I know if a new rasbora will fit into the group?
Introduce new fish slowly and observe interactions. Quarantine newcomers before adding them to reduce disease risk. Place them in a separate area first or use a tank divider if possible. Gradual introduction helps prevent aggression and encourages smooth integration.

Are there behaviors that indicate strong bonds among rasboras?
Yes, synchronized swimming, gentle interactions, shared feeding, and calm resting indicate strong social bonds. When these behaviors are consistent, it shows the fish feel secure and trust each other, which is essential for a healthy, harmonious tank.

How do I reduce conflicts in a rasbora tank?
Provide adequate space, hiding spots, and visual barriers. Maintain proper water conditions and consistent feeding schedules. Avoid overcrowding and introduce new fish gradually. Regular observation helps detect and address tension before it escalates.

What role does water quality play in their behavior?
Poor water quality stresses fish, leading to aggression, lethargy, or reduced feeding. Maintaining proper pH, temperature, and cleanliness ensures comfort, promotes natural behavior, and strengthens social bonds among rasboras.

How long does it take for rasboras to settle in together?
Adjustment varies depending on tank conditions, group size, and fish temperament. Most rasboras establish stable social structures within one to two weeks if the environment is calm and supportive. Patience and observation ensure smooth integration.

Can rasboras get along if one is sick?
Sick fish may be more vulnerable and sometimes avoided or bullied. Isolating the sick fish helps recovery and prevents stress in the group. Quick treatment and maintaining water quality reduce the impact on the overall tank harmony.

How can I tell if the tank environment is suitable for schooling?
Look for open swimming spaces, minimal overcrowding, and consistent schooling behavior. Fish that move confidently together without aggression indicate that the environment meets their social and physical needs.

What are common mistakes that disrupt harmony?
Overcrowding, inconsistent feeding, poor water quality, and sudden changes in temperature or light can disrupt harmony. Lack of hiding spots or aggressive tank mates also causes tension. Regular maintenance and careful monitoring prevent these issues.

How do I maintain long-term peace among rasboras?
Maintain stable water conditions, provide enough space, and observe interactions regularly. Keep feeding routines consistent, introduce new fish gradually, and ensure environmental enrichment. These practices support healthy social dynamics and reduce stress over time.

Why is observing daily behavior important?
Daily observation helps identify changes in schooling, feeding, or aggression early. Early detection allows adjustments to environment or care routines, ensuring the tank remains harmonious and all rasboras thrive.

What is the best way to support timid fish in the group?
Provide hiding spots, plants, and visual barriers. Ensure equal access to food by feeding in multiple locations. Calm, consistent care helps timid fish gain confidence and participate in schooling and social behaviors without fear.

How do I know if rasboras are enjoying their environment?
Indicators include synchronized swimming, calm resting, active feeding, and minimal aggression. Bright coloration and consistent energy levels also suggest that the fish are comfortable and thriving in their tank.

Can environmental enrichment improve social behavior?
Yes, plants, open spaces, and varied tank layouts encourage natural swimming patterns, reduce stress, and support gentle interactions. Enrichment keeps fish mentally stimulated while promoting harmony and active schooling within the group.

Is it normal for rasboras to occasionally separate from the group?
Yes, occasional exploration or minor separation is normal and not a cause for concern. Temporary separation often happens during feeding or curiosity, but the fish usually return to the school quickly if the environment is safe.

How do I integrate new plants or decorations without disturbing the group?
Add items gradually and rearrange the tank carefully to avoid sudden changes. Observe fish reactions and provide hiding spots to reduce stress. Gradual adjustments maintain calm schooling behavior and minimize aggression.

What is the role of lighting in social behavior?
Moderate, consistent lighting helps rasboras feel secure. Too bright or fluctuating light can stress the fish and disrupt schooling or feeding behavior. Natural light cycles or controlled aquarium lighting support harmony.

How often should I check water parameters?
Weekly testing is recommended for temperature, pH, ammonia, nitrite, and nitrate levels. Regular monitoring ensures a stable environment, reduces stress, and supports peaceful social interactions among rasboras.

Can rasboras show affection toward each other?
While not emotional in the human sense, rasboras show trust and comfort through gentle interactions, close swimming, and coordinated behavior. These actions reflect strong social bonds and a well-adjusted group.

What steps should I take if aggression increases?
Identify the source, check water quality, and ensure adequate space. Rearrange hiding spots, reduce group size if necessary, or separate aggressive individuals temporarily. Consistent care helps restore harmony quickly.

How do I encourage shy rasboras to join schooling?
Provide plants and hiding spots for confidence, feed in multiple areas, and maintain a calm environment. Over time, timid fish will gradually participate in the group’s synchronized swimming and feeding behaviors.

Are there seasonal changes in behavior?
Some subtle changes may occur with light, temperature, or feeding schedules, but rasboras generally maintain consistent schooling and interaction patterns if conditions remain stable.

How can I tell if the tank is overcrowded?
Signs include constant chasing, difficulty swimming, increased aggression, and stress behaviors like hiding or reduced feeding. Adequate space and proper group size prevent these issues.

What foods support healthy social behavior?
High-quality flakes, micro-pellets, and occasional live foods support energy, activity, and natural behavior. Balanced nutrition helps maintain active schooling, gentle interactions, and reduced aggression.

How do I prevent dominance issues?
Keep proper group sizes, provide hiding spots, and ensure consistent feeding. Gradual introduction of new fish and a calm environment reduce competition and dominance disputes.

How long can rasboras live together peacefully?
With stable conditions, proper care, and adequate space, rasboras can coexist peacefully for several years. Maintaining harmony depends on attention to social dynamics and tank environment.

What should I do if a rasbora becomes isolated?
Check for illness or stress, provide hiding spots, and ensure gentle group interactions. Gradually reintegrate the fish while monitoring behavior to support a smooth return to the school.

Can water flow affect social behavior?
Moderate water flow supports swimming and activity, while too strong a current can stress fish and disrupt schooling. Balanced flow encourages natural movement and reduces tension.

How does tank size influence aggressive tendencies?
Smaller tanks limit space, increasing stress and aggression. Larger tanks provide room for schooling, exploration, and personal space, reducing conflicts and supporting harmonious behavior.

How often should I observe behavior for changes?
Daily observation is ideal. Watching feeding, schooling, and resting behavior allows early detection of stress, aggression, or illness, ensuring timely adjustments for a balanced tank.

Are hiding spots essential for peaceful coexistence?
Yes, hiding spots reduce stress, prevent aggression, and support timid fish. Plants, rocks, and decorations create a balanced environment where all rasboras feel safe and secure.

Can consistent care improve long-term harmony?
Yes, maintaining stable water conditions, regular feeding, and proper tank maintenance reinforces social bonds and reduces stress. Consistency is key for a calm, active, and well-adjusted group.

How do I introduce multiple new rasboras at once?
Introduce gradually using a quarantine or divider, monitor behavior closely, and ensure ample space. Gradual integration prevents aggression and helps establish a balanced social hierarchy.

What behaviors indicate that rasboras are thriving?
Synchronized swimming, gentle interactions, active feeding, calm resting, and bright coloration all indicate healthy, well-adjusted fish. Consistent observation confirms overall well-being and social harmony.

How do I maintain long-term schooling behavior?
Provide open swimming areas, consistent feeding, minimal disturbances, and a calm environment. Encourage group cohesion through proper tank setup and careful introduction of new fish or decorations.

What is the best approach to a new tank setup?
Arrange plants and hiding spots before adding fish, maintain water parameters, and introduce fish gradually. A prepared environment encourages synchronized swimming, minimal aggression, and peaceful coexistence from the start.

Can seasonal water changes impact social behavior?
Significant changes in temperature or chemistry can stress fish. Gradual, consistent water changes maintain stability and reduce disruption to schooling, feeding, and resting behaviors.

What role does diet variety play in behavior?
Offering varied foods supports energy, activity, and natural instincts. A balanced diet encourages active swimming, gentle interaction, and proper growth, reducing stress and promoting harmony.

How can I recognize early signs of conflict?
Watch for chasing, nipping, or sudden darting. Subtle changes in schooling patterns or avoidance behaviors may signal tension. Early intervention helps prevent escalation and maintains a peaceful tank.

What are common mistakes that disrupt harmony?
Overcrowding, inconsistent feeding, poor water quality, sudden changes, and lack of hiding spots disrupt social behavior. Monitoring conditions and maintaining routine prevent these problems.

How do I support a shy fish joining the group?
Provide hiding spots, calm environment, and consistent feeding. Gradual encouragement and patience help timid fish integrate into the school without stress.

Why is regular observation critical?
Daily checks allow early detection of stress, aggression, or illness. Consistent monitoring ensures peaceful coexistence, healthy behavior, and overall well-being.

How do I know when the tank environment is ideal?
Indicators include calm resting, synchronized swimming, gentle interactions, and minimal aggression. Stable water parameters and proper tank layout support these behaviors.

Can adding decorations disrupt social behavior?
Sudden changes can cause temporary stress. Gradual additions with observation maintain calm schooling and gentle interactions. Decorations provide hiding spots and reduce conflicts.

How can water temperature affect rasbora behavior?
Fluctuations or extremes stress fish, leading to aggression or reduced activity. Stable temperatures support synchronized swimming, feeding, and resting, promoting harmony.

What’s the best way to prevent aggression during feeding?
Feed small amounts in multiple locations, maintain consistent schedules, and ensure adequate space. These practices reduce competition and support calm, active feeding behavior.

How do I ensure timid fish get enough food?
Feed in several spots, provide hiding areas, and observe interactions. Timid fish will gradually approach and feed alongside others without fear.

Can rasboras become more social over time?
Yes, with stable conditions and consistent care, timid or new fish gradually join schooling, interact gently, and display reduced aggression, enhancing group cohesion.

How can I tell if a tank is too small?
Signs include frequent chasing, difficulty swimming, stress behaviors, and disrupted schooling. Adequate space is essential for active, peaceful behavior.

Do rasboras need specific tank decorations?
Plants and hiding spots support natural behavior, reduce aggression, and provide security. Open swimming areas allow synchronized movement, promoting calm interactions and social cohesion.

What’s the best method to introduce new food?
Introduce gradually while monitoring reactions. Ensure all fish access it and maintain feeding routines. Gradual introduction prevents stress and supports group harmony.

How important is water flow for schooling behavior?
Moderate, consistent flow encourages swimming and activity without stressing the fish. Proper flow maintains natural movement patterns and reduces tension in the group.

How do I know when a rasbora is sick?
Look for lethargy, faded colors, loss of appetite, or isolation. Prompt treatment and isolation protect both the sick fish and the social harmony of the tank.

What steps prevent long-term stress?
Stable water parameters, consistent feeding, ample space, hiding spots, and gradual changes reduce stress. Monitoring behavior ensures a calm, harmonious environment.

How can I tell if new rasboras are accepted by the group?
Indicators include synchronized swimming, gentle interactions, and participation in feeding. Rapid integration shows the fish feel safe and accepted.

Does tank layout affect social behavior?
Yes, open areas support schooling, hiding spots reduce aggression, and plants or decorations create security. Thoughtful layout fosters harmony and active behavior.

How do I handle aggression during new fish introductions?
Use quarantine, tank dividers, or gradual introduction. Monitor closely and ensure hiding spots. Early intervention reduces stress and maintains social balance.

Are bright colors a sign of comfort?
Yes, healthy, vibrant colors indicate low stress, good nutrition, and positive social behavior. Faded or dull colors often signal discomfort or illness.

What role does feeding order play?
Feeding in multiple areas prevents competition and ensures all fish eat. Consistent feeding routines support calm, active behavior and reduce tension.

Can minor disturbances disrupt social behavior?
Yes, sudden movements, loud noises, or rapid changes in lighting can stress fish temporarily. Calm handling maintains harmony.

How do I support older fish in the group?
Ensure accessible food, gentle interactions, and calm environment. Older fish benefit from stable social dynamics and proper care to maintain health.

How do I prevent dominance hierarchies from forming?
Provide space, hiding spots, and gradual introductions. Equal access to food and calm environment reduces competition and aggressive behavior.

Can water chemistry changes affect schooling?
Yes, fluctuations in pH, hardness, or temperature can stress fish, disrupting coordinated swimming and gentle interactions. Stable conditions support natural behavior.

What’s the best approach to monitor behavior?
Observe daily during feeding, swimming, and resting. Take note of aggression, isolation, or abnormal behavior. Early detection helps maintain harmony.

How important is social observation for new tank setups?
Very important. Watching interactions ensures new fish integrate smoothly, aggression is minimized, and schooling and feeding behaviors develop naturally.

Do rasboras interact differently with younger fish?
Yes, adult fish usually tolerate or protect younger fish if the environment is calm. Sufficient hiding spots help younger fish participate in schooling safely.

Can introducing multiple species cause stress?
Yes, aggressive or much larger species can intimidate rasboras. Choosing peaceful, similarly sized tank mates prevents stress and supports social cohesion.

How can lighting changes affect behavior?
Sudden or extreme changes cause stress, disrupt feeding, and alter schooling. Consistent lighting supports calm, active, and natural interactions.

What is the role of observation in maintaining long-term health?
Regular monitoring allows early intervention for aggression, illness, or stress. Observing schooling, feeding, and resting patterns ensures continued harmony and well-being.

How do I maintain peace when adding new decorations?
Add gradually, provide hiding spots, and observe reactions. Slow changes minimize disruption and maintain calm interactions.

Can rasboras adapt to minor environmental changes?
Yes, gradual adjustments are usually tolerated. Rapid or extreme changes cause stress and can disrupt social behavior, schooling, and feeding patterns.

What’s the most reliable way to detect tension?
Watch for chasing, nipping, avoidance, or disrupted schooling. Early recognition allows adjustments to tank layout or care routines to maintain harmony.

How does feeding variety affect group dynamics?
Varied diet maintains energy, activity, and engagement. Adequate nutrition reduces competition and supports gentle interactions, synchronized swimming, and calm feeding behavior.

Can rasboras show preference for certain tank areas?
Yes, they may choose areas with plants, hiding spots, or gentle currents. Preferred spaces reflect comfort and security within the tank.

How do I support timid fish long-term?
Provide hiding spots, gradual exposure to group activities, and calm feeding routines. Consistent care encourages confidence and participation in schooling and social behavior.

Are there subtle signs of happiness in rasboras?
Synchronized swimming, gentle interactions, calm resting, active feeding, and vibrant colors indicate comfort, low stress, and a thriving, well-adjusted group.

**How do I prevent food-related aggression?

Observing your rasboras closely provides valuable insight into their social behavior and overall well-being. When they swim in harmony, feed together without aggression, and rest calmly near one another, it reflects a secure and comfortable environment. These small details help you understand whether your tank setup meets their needs and allows you to make adjustments when necessary. Maintaining consistent water conditions, proper tank size, and a balanced feeding routine plays a crucial role in promoting positive interactions. Even subtle signs, such as gentle nudges or synchronized movement, indicate that the fish feel safe with each other and with their surroundings. By paying attention to these behaviors, you can ensure a peaceful and thriving group that displays natural instincts and healthy social dynamics.

Creating a balanced environment goes beyond simply adding plants and decorations. It involves providing adequate open swimming space, hiding spots, and visual barriers to allow each fish to feel secure. A tank that supports schooling encourages the rasboras to move together, reduces stress, and limits aggressive behavior. Consistent feeding schedules, appropriate group size, and proper nutrition all contribute to maintaining harmony in the tank. Timid or newly introduced fish benefit from gradual integration, as sudden changes can trigger conflict or anxiety. By observing how the group interacts during feeding and exploring the tank, you can gauge their comfort level and make adjustments if needed. Over time, these practices lead to a stable social structure, allowing the fish to thrive both physically and behaviorally.

Long-term success with rasboras depends on ongoing observation and care. Daily monitoring of swimming patterns, feeding behavior, and resting habits helps detect early signs of stress or aggression. Maintaining water quality, providing a calm environment, and ensuring consistent care routines support the overall health of the fish. The benefits of a well-balanced tank are evident in active schooling, gentle interactions, and vibrant coloration. A peaceful group of rasboras demonstrates trust, comfort, and proper social dynamics. By paying attention to these factors, you can create an environment that encourages natural behavior, reduces stress, and promotes long-term well-being. Careful planning, consistent maintenance, and mindful observation ensure that your rasboras coexist happily and display the behaviors that indicate a thriving, harmonious aquatic community.