Phalloceros ocellatus, the Prado toothcarp, is a species of poeciliid fish native to Brazil.
Phalloceros ocellatus is found in the coastal drainages between Prado and Sooretama in Brazil.
The females of the species grow to a total length of , while males remain smaller at . .
The fish live in tropical freshwater; and are benthopelagic.
The fish is named in Latin = meaning with little eyes, referring to eye-like spot, the "ocellus" on sides.