Angel shark  (Squatina squatina)

By-catch: In the fishing industry, the part of the catch made up of non-target species.
Crustaceans: Diverse group of arthropods (a phylum of animals with jointed limbs and a hard chitinous exoskeleton) characterised by the possession of two pairs of antennae, one pair of mandibles (parts of the mouthparts used for handling and processing food) and two pairs of maxillae (appendages used in eating, which are located behind the mandibles). Includes crabs, lobsters, shrimps, slaters, woodlice and barnacles.
Dorsal fins: The unpaired fins found on the back of the body of fish, or the raised structure on the back of most cetaceans.
Molluscs: A diverse group of invertebrates, mainly marine, that have one or all of the following; a horny, toothed ribbon in the mouth (the radula), a shell covering the upper surface of the body, and a mantle or mantle cavity with a type of gill. Includes snails, slugs, shellfish, octopuses and squid.
Nocturnal: Active at night.
Pectoral fins: On fish, the pair of fins that are found one on each side of the body just behind the gills. They are generally used for balancing and braking.

1. IUCN Red List (June, 2007)
   http://www.iucnredlist.org
   
2. Compagno, L.J.V. (1984) FAO Species Catalogue. Vol. 4: Sharks of the World. An annotated and illustrated catalogue of shark species known to date. Part 1: Hexanchiformes to Lamniformes. Food and Agriculture Organization of the United Nations, Rome.
   
3. Compagno, L.J.V., Fowler, S. and Dando, M. (2005) Sharks of the World. Harper Collins, London.
   
4. Gill, A. (2005) Look into our eyes. BBC Wildlife, 23: 16 - 17.
   
5. FAO Species Fact Sheet (July, 2007)
   http://www.fao.org/fi/website/FIRetrieveAction.do?dom=species&fid=2046