Ключевые слова: actinopterygii, amazon, america, american, animal, aquarium, characiformes, danger, dangerous, fauna, fish, freshwater, life, nattereri, natural, nature, parana, piranha, piranhas, pygocentrus, red, redbellied, rio, river, serrasalmus, sharp, south, swim, teeth, tropical, underwater, water, wild, wildlife,