Albicetus is a genus of stem-sperm whales that lived during the Miocene Epoch, around 15 million years ago, and was discovered in Santa Barbara, California in 1909.

[2][1] The holotype was recovered from an unspecified location in the sea cliffs near the original Santa Barbara Lighthouse in 1909, which is believed to most likely be part of the Monterey Formation.

[1][4][5] This genus was originally thought to represent a sperm whale, however, in 2008, the type species, Ontocetus emmonsi, was discovered to actually be a walrus.

However, Albicetus is most similar in general shape and characteristics with Aulophyseter morricei, except for the dentition in which the latter possesses only small, vestigial upper teeth lacking enamel.

†Eudelphis †Zygophyseter †Brygmophyseter †Acrophyseter †Livyatan †Albicetus † 'Aulophyseter' rionegrensis †Orycterocetus †Idiorophus †Physeterula †Idiophyseter Physeter †Aulophyseter †Placoziphius †Diaphorocetus †Aprixokogia Kogia †Praekogia †Scaphokogia †Thalassocetus The type specimen, USNM 10923, consists of a partial skull (mainly remains of the beak) and isolated tooth fragments.