Seaslug,
We used to eat them right on the bottom out of the shell. I wasn't sure about it the first time but it is the best way to eat a fresh scallop. My friends still initiate new divers with the ritual of cleaning one out and popping it in the mouth right there under water.
The reactions are varied but no one has chickened out that I know of.
Lorain Saddler used to bring a bottle of soy sauce out on the boat and bring a few up after every dive when I was hangning around on Catalina back in the day.
Do you still dive?