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The picture contains many more species than the scallop; saddle oysters, serpulid worms and a very interesting large worm (possibly a terebellid).
At Scarborough I put a lot of effort into trying to identify every single living thing I find. When I went to Devon, however, I only had limited time and got caught up in the macrofauna side of things.
Lat/Lng: 50.4028, -3.5237
OS grid ref: SX918569