Sue Daly / Close up of the face of a Brill (Scophthalmus rhombus), swims out of frame, Sark, British Channel Islands, UK, August.

Sue Daly / Brill (Scophthalmus rhombus) camouflaged on the seabed, Sark, British Channel Islands, UK, August.

Ashley Cooper / Greenland Halibut fish caught off Ilulissat, Greenland. July 2008.

Sue Daly / Norwegian topknot (Phrynorhombus norvegicus), Trondheimsfjord, Norway, July.

Sue Daly / Close up of the eyes of a Brill (Scophthalmus rhombus), 2013 , Sark, British Channel Islands, UK, August.

Sue Daly / Topknot (Zeugopterus punctatus), swims out of the frame, Sark, British Channel Islands, UK, August.

Sue Daly / Norwegian topknot (Phrynorhombus norvegicus) St Abbs Voluntary Marine Reserve, Scotland (North Sea).

Michael Pitts / Turbot (Scophthalmus maximus) North Atlantic. United Kingdom, November

Michael Pitts / Turbot (Scophthalmus maximus) detail of the eyes and mouth, United Kingdom, September

Sue Daly / Turbot (Scophthalmus maximus) camouflaged against seabed. Channel Islands, May.

Juan Manuel Borrero / Illustration of Turbot (Scophthalmus maximus). Pencil and watercolor painting.

Paul Hobson / Turbot (Scophthalmus maximus), head close up from above, The Wash, Lincolnshire, UK