Ключевые слова: animal group, aquaculture, aquatic, aquatic life, behavior, biodiversity, biology, calm water, ecology, ecosystem, ecosystem balance, environment, feeding, fish, fish feeding, fish migration, fish scale, fish species, fish swimming, fishery, food chain, freshwater, group, habitat, natural, nature, predator, red fish, river, riverbank, school, survival, sustainable, swim, underwater, water, water life, water plant, white fish, wildlife,