Ключевые слова: actinopterygii, amazon, america, american, animal, aquarium, aquatic, background, beautiful, bellied, brazil, close, closeup, color, colorful, de, exotic, fauna, fin, fish, fishes, fresh, fresh water, life, machado, nattereri, natural, natures, one, paraguay, piranha, plata, pygocentrus, pygocentrus nattereri, red, redbellied, rio, river, serrasalmidae, sharp, south, swim, tank, teeth, there, tropical, underwater, water, wild, wildlife,