Also called Gunnel, the Butterfish, Pholis gunnellus is a common, small, inshore fish in the north. It is often found in rock pools and is easily identified by the dorsal fin which extends the whole length of its body and a distinctive row of white-ringed black spots down its back which usually number nine to thirteen. However, I have seen them with only one! The Butterfish attains a length of about 25cms and although eel-like in appearance and its sinuous movements, it is a type blenny. It can often be seen moving in and out of cracks and crannies on inshore reefs searching for worms and small crustaceans on which it feeds.

Location: North Sea. St. Abbs Marine Reserve