It appears to be one of the species of abalone, perhaps one commonly known as the "Japanese abalone". There seem to be whole shells available online: http://orders.mopsupplies.com/p/9060442 ... tural.html
There is also a kind of sushi that uses abalone meat named "awabi sushi" so this could be a regional term that just took off in the MOP business.
The examples I see online aren't remarkably pink in and of themselves, but I did find a species of abalone commonly called "pink abalone" and there are a lot of blurred lines in the taxonomic classification of the abalone family. GEC could also have found a way to dye those lady legs.