Photo copyright Tim Nicholson.
Three-bearded rockling Gaidropsarus vulgaris
Taken in the Isle of Man.

Lives on the seafloor between 20 and 120 m. Feeds on crustaceans, small fish and molluscs.

Read more on diving the Isle of Man.

Further Reading
Dive sites and marine life of the Calf of Man and neighbouring area by Bill Sanderson, Bruce McGregor and Andrew Brierley, Immel Publishing Ltd, 1994, Paperback.
The Underwater Photographer: Digital and Traditional Techniques, by by Martin Edge, Paperback, 536 pages (2009)