Ratabulus is a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae.

Ratabulus was first formally proposed as a monotypic genus in 1924 by the American ichthyologists David Starr Jordan and Carl Leavitt Hubbs with Thysanophrys megacephalus, which had been described in 1917 by Shigeho Tanaka from a type specimen obtained at a fish market in Tokyo, designated as its type species.

[3] Ratabulus did not have its etymology explained by Jordan and Hubbs, however, the name was also spelled as Rutabulus by them, likely to derive from rutabulum, which is a Latin word meaning shovel, an allusion to the shovel-nosed head of R.

There are 3 or more spines below the eye on a suborbital ridge and the lappet on the iris is pointed.

[5] One species, R. prionotus, has moved through the Suez Canal to be recorded as a Lessepsian migrant in the eastern Mediterranean Sea.