Behemotops (from the Biblical monster Behemoth, by Linnaeus and others believed to be a hippo)[2] is an extinct genus of herbivorous marine mammal.

Discovery of Behemotops helped place desmostylians as more closely related to proboscideans than sirenians, although relationships of this group are still poorly resolved.

In 1977, at the same location, fossil collector Douglas Emlong discovered a poorly preserved half right mandible — USNM 244033 — matching the first specimen.

In 1976, Emlong discovered a juvenile mandible — USNM 244035 — on Olympic Peninsula, Clallam County, Washington (48°12′N 123°54′W / 48.2°N 123.9°W / 48.2; -123.9, paleocoordinates 47°48′N 115°00′W / 47.8°N 115.0°W / 47.8; -115.0)[11] which Domning, Ray & McKenna 1986 made the holotype of B. proteus.

The cranial features of this specimen were similar to those of Cornwallius, from which Cockburn & Beatty 2009 concluded that Desmostylidae and Paleoparadoxiidae probably diverged earlier than previously believed.