Ключевые слова: amazon, animal, aquarium, aquatic, aquatic life, biology, bubbles, dark, ecosystem, environment, fauna, finn, fish, food chain, freshwater, gill, green, group, ichthyologists, leporinus fasciatus, light, motion, nature, orange, oxygen, pisces, reflection, river, scale, school, shoal, silver, swimming, tank, underwater, vertebrate, water, wildlife, zoology,