An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Cidaris cidaris (Linnaeus, 1758) - Long-spine slate pen sea urchin (Sea urchins)
Purple sea urchin
Cidaris cidaris
- lateral view test 1

Purple sea urchin
Cidaris cidaris
- lateral view test close-up 1

The specimen was photographed by Didier Descouens, Wikipedia, on the 15th January 2014. The same image appears on WoRMS.

The Cidaris cidaris here is a preserved specimen from the French Mediterranean, in collection at Muséum d'Histoire Naturelle de Toulouse (MHNT.ZOO.2006.25.1).

Distribution: In depths of more than 130m, on gravel, stones and coral, to the north and west of the British Isles.
Southward, E.C.; Campbell, A.C. (2006). [Echinoderms: keys and notes for the identification of British species]. Synopses of the British fauna (new series), 56. Field Studies Council: Shrewsbury, UK. ISBN 1-85153-269-2. 272 pp..

Cidaris cidaris Long spine slate pen sea urchin images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.