piranha natterer. serrasalmus natterer. marine background. fish close-up

actinopterygii aggressive amazon america american animal aquarium background bellied black bony brazil bright brilliant carnivorous characiformes close closeup common convex danger dangerous dark eating emperor fauna fish fishes format francisco fresh freshwater full headed king lateral latin length life man marine natterer nattereri natterers natural nature one piranha piraya portrait predatory pygocentrus red rio river rooseveltiella san sao serrasalmidae serrasalmus shining shiny side single soft south swim tailed tropical underwater water wild wildlife zoo