Sue Daly / Tompot blenny (Parablennius gattorugine), swims out of frame, Sark, British Channel Islands, UK, June.

Sue Daly / Close-up of a Tompot blenny (Parablennius gattorugine) looking around on the seabed, Sark, British Channel Islands, UK,

Sue Daly / Tompot blenny (Parablennius gattorugine) looking around on the seabed, Sark, British Channel Islands, UK,

Alex Mustard / Tompot blenny (Parablennius gattorugine) male peers out of its den, in leg of Swanage Pier, Swanage, Dorset, UK, English Channel, August

Alex Mustard / Tompot blenny (Parablennius gattorugine) male peering out of its den, in a leg of Swanage Pier. Swanage, Dorset, UK, English Channel. North East Atlantic Ocean, August

Michael Pitts / Tompot Blenny (Parablennius gattorugine) on the wreck site of HMS Invincible. Eastern Solent Channel, England, UK, August 2013.

Franco Banfi / Striped blenny (Parablennius rouxi) watching of out from its den covered with encrusting sponge, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Blenny (Parablennius zvonimiri) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Blenny (Parablennius pilicornis) male at 'Punta Madonna' dive-site, Ponza Island, Italy, Tyrrhenian Sea, Mediterranean Sea.

Franco Banfi / Blenny (Parablennius pilicornis) female at 'Punta Madonna' dive-site, Ponza Island, Italy, Tyrrhenian Sea, Mediterranean Sea.

Sue Daly / Jewel Anemones (Corynactis viridis) and Tompot Blenny (Parablennius gattorugine). Vingt Clos, Sark, British Channel Islands, August.

Sue Daly / Tompot Blenny (Parablennius gattorugine) English Channel, off the coast of Sark, Channel Islands, July

Pete Oxford / Staghorn Coral (Acropora formosa), Banda Sea, Indonesia

Pete Oxford / Staghorn Coral (Acropora formosa) and Phillipines Chromis (Chromis scotochiloptera) school, Banda Sea, Indonesia