Franco Banfi / Piraputanga, (Brycon hilarii) reflected on the water surface, Aquario Natural, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri), on a secondary river from the Paraguay River, Pantanal, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri), on a secondary river from the Paraguay River, Pantanal, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri ), at night, in tributary of Paraguay River, Pantanal, Brazil

Franco Banfi / Red-bellied piranha (Pygocentrus nattereri ), in tributary at night, Paraguay River, Pantanal, Brazil

Franco Banfi / Shoal of Piraputanga fish (Brycon hilarii), close to the surface, Aquário Natural, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Piraputanga fish (Brycon hilarii), reflected on the water surface, Aquário Natural, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Yellow king piranha (Pygocentrus natteri), Paraguay River, Pantanal, Brazil

Franco Banfi / Piraputanga, (Brycon hilarii) close to the surface at the Nascente Azul, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Freshwater Dorado, (Salminus brasiliensis) reflected on the surface, Recanto Ecològico, Rio da Prata, Bonito, Mato Grosso do Sul, Brazil

Luke Massey / Giant otters (Pteronura brasiliensis) feed on a Golden dorado (Salminus brasiliensis) Pantanal, Brazil.

Sylvain Cordier / Redeye Piranha ( Serrasalmus rhombeus / niger ) out of water, close up of teeth, Rio Negro, Amazonas, Brazil.