about 10 cm across the shell
No interactions present.
...edit and move to invertebrates :)get better ID and pics
I wasn't thinking paraphylogenetically enough.
Molecular Biologist and Biology Teacher but only an amateur Naturalist.
....I have just retired from molecular biology/biochemistry/microbiology.
Lat/Lng: 51.736, -4.5715
OS grid ref: SN225072