Squalodontidae or the shark-toothed dolphins is an extinct family of large toothed whales who had long narrow jaws.

[2][1] With their cosmopolitan Miocene distribution and heterodont dentition, squalodontids are the most common and basal platanistoids.

The premaxillae on their elongated rostrum have large and slightly convex fossae for the air sacs associated with the presence of a melon, indicating the ability for echolocation.

[2] The genus Squalodon was named by French naturalist Jean-Pierre Sylvestre de Grateloup in 1840[4] based on a jaw fragment he thought belonged to a reptile.

In extant odontocetes, however, the dentition is atavistic with all teeth reduced to simple, undifferentiated conical shapes.