Ключевые слова: aggressive, amazon, aquarium, aquatic, aquatic plants, behavior, biodiversity, captivity, close up, color, conservation, danger, dense, ecosystem, environment, exhibit, fauna, fins, fish, fishes, foliage, freshwater, glass, green, group, habitat, marine life, natural, nature, pack, piranhas, predators, redbellied, reflection, river, scales, school, sharp, shoal, shoaling, south america, species, survival, swimming, teeth, tropical, vibrant, water, wildlife,