Rhamphocottus is a genus of marine ray-finned fishes belonging to the family Rhamphocottidae.

[4] Rhamphocottus is a combination of rhamphos, meaning "beak", and cottus, the type genus of the Cottoidea, an allusion to the elongated snout of these fishes.

[5] Rhamphocottus contains two species:[6][2] Rhamphocottus grunt sculpins have a large head which can be equivalent to as much as 60% of their standard length with an elongated snout and bony ridges on either side of the head, an alternative name suggested for them was horsehead sculpins.

There is a lateral line but this is only extends to the rear third of the second dorsal fin, and comprises roughly 25 pores set in short, raised tubes.

[4] Rhamphocottus grunt sculpins are often seen sheltering in empty shells, including those of the giant barnacle (Balanus nubilis) as well as discarded bottles and cans.