Ocucajea is an extinct species of primitive whale that lived during the Eocene epoch of South America. It belonged to the family of basilosaurs, containing the first fully aquatic cetaceans, and was closely related to dorudontines, a group of smaller basilosaurs. Ocucajea could grow up to 3.2 meters in length and had an elongated body. It still retained its hind limbs, although they were probably vestigial.
The genus of Ocucajea consists of a singular species: O. pinklingi. Fossils have been found in Peru and it was described in 2011. It was the smallest species within its family and it probably hunted fish.
Uhen et al. 2011