The sea squirt Ciona intestinalis has no common name and yet is an exceedingly common animal off western and southern shores of Britain, although less so in the North Sea. Although it is a solitary animal, it can often be found in huge aggregations, particularly in Scottish sea lochs. Basically a light grey colour, this sea squirt may grow to about 8cms and always has a series of yellow fringing marks around the siphons.

Location: Loch Hourn, W. Scotland