It is generally recommended to keep no more than one in captivity, as redeye piranhas generally do not tolerate tankmates, particularly when they are adults.

Serrasalmus rhombeus (redeye piranha)

Serrasalmus rhombeus (Redeye Piranha, caribe amarillo)

Serrasalmus rhombeus (Redeye Piranha, and see below), is a fish of the piranha family Characidae found in South America in the Amazon and Orinoco river basins, the north and eastern Guiana Shield rivers, and northeastern Brazilian coastal rivers.

Dangerous and Deadly includes Gila monster, Red lionfish, Pinecone fish, Electric eel, Gaboon viper, Spotted wobbegong, Stonefish, Redeye piranha, Whitespotted bamboo shark, Tentacled Snake, Thunder the Alligator snapping turtle and a Cottonmouth (Water moccasin).