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Sea slug shell used by Hermit crab
Observed: 22nd July 2012 By: Nick Upton
Added: 10th August 2012
I found many hermit crabs (Pagurus bernhardus) in these unusual shells low on sandy Rhossili Bay, Wasles, in the Sand mason worm zone. I'm now sure the shells are of a primitive shelled sea slug, a predator of sand mason worms which is well known at Rhossili.