Help please.. I think this is some kind of clam.. but not sure

[under water]

This was found in the Coral Sea at Osprey Reef. I think it was about 2 inches or so.
There were plenty of giant clams around but this seems more like some kind of a file clam. I have searched the books and the internet to no avail.
Any ideas .. Thanks!

 

[Walter]

Not a clam, but a scallop.

 

[under water]

Thanks Walter!
I was thinking that it was a scallop, but couldn't find anything as colorful in the books or through a search. A little more searching this morning and I found a picture taken for National Geographic in 1995 that was the same species (Reef Scallop).
Yap Islands, Micronesia, Reef Scallop, 1995, Photo of the Day, Picture, Photography, Wallpapers - National Geographic
Apparently the red/orange dots are its eyes! Fantastic.
I remember seeing scallops swimming for the first time in Quadra Island and that was quite an experience. I recall thinking that they swam just like they did in the cartoons.