c.5cm in length. Striped patterning on body with distinctive yellow spots on legs and white spots on tail.
No interactions present.
I hadn't realised how striking these animals are (neither the photo above nor the ID guides I've looked at do them justice) until I and my 4-year-old daughter caught this specimen whilst rockpooling near Newlyn. The yellow, white and black patterning is really quite beautiful.
Can't help with the ID I'm afraid, but I agree that it is a very attractive-looking beast! Will have to send my seven-year-old off to find one next time we're near rockpools.
Entomologist and biological recorder
Origin June 2013 (Edit updated H'link)
I'm still finding it hard to accept (as a newcomer) why so few of the iSpot community find it so difficult to comment or, in this case, actually agree! Surely it's a Prawn!
May I offer, only offer, after years (2009!) of neglect, Palaemon elegans.
See http://www.marlin.ac.uk/species/detail/2035 though I don't think we can see the teeth
THREE MARINE PROJECTS
Lat/Lng: 50.096839487649, -5.5390781164169
OS grid ref: SW469278
Rockpools in granite outcrop.