What is "rock gunnel"

n. slippery scaleless food fish of the northern Atlantic coastal waters [syn: butterfish, Pholis gunnellus]

The rock gunnel (Pholis gunnellus) is an eel-like fish found in the intertidal and subtidal zones of the North Atlantic. It is one of two species of gunnel native to the Atlantic Ocean, the other being the banded gunnel. The rock gunnel is capable of remaining above the waterline at low tide and breathing air.