Ключевые слова: actinopterygii, amazona, america, american, aquarium, blue, brazil, brown, cichlid, cichlidae, cichliformes, coral, depth, discos, discus, diving, equipment, exotic, fauna, fin, fish, force, fresh, freshwater, humanely, lakes, less, motley, nature, naval, ocean, reef, sink, stream, swimming, tank, tropical, water,