The Common Blenny is also called the Smooth Blenny because it lacks the lappets or fringe on the forehead present in most of this family.

This fish is found off the south and west coasts of Britain and in seas as far south as the Mediterranean.

Another blenny species Parablennius ruber has been recorded in British seas. This new blenny is very similar to the Tompot Blenny and specimens may have been overlooked before.
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The rarest of the four British Blennidae is the Butterfly Blenny, Blennius ocellaris, which is found in deep water and never on the shore, although there are unconfirmed reports of specimens found intertidally on the Isle of Man coast. There is a photograph of this fish in the Plymouth Aquarium Guide by Geoff Potts, 1983. ISBN 0 903241 05 6.

27 August 2011
A Peacock Blenny, Salaria pavo (Risso, 1810), was seen on the Brittany coast, northern France: "It was found on the shore in the Golfe du Morbihan (a large natural harbour) in south Brittany. They were the commonest fish on the shore, under rocks from mid-shore down."

The Peacock Blenny, Salaria pavo has recently has been found in considerable numbers in the Morbihan and near Concarneau, more towards the western tip of Brittany.