Small clam-like creatures that dig at the shore of a beach?

Question

something pronounces co-kee-nas

I don't know the spelling, if you know what they are called please help me...

this little things fascinate me.

Answer 1

if there not in a shell they might be sandcrabs and if they are small and look like a butterfly wing they are called perywinkles if you open them up they look like a butterfly they are beautiful!!!

                        Hope i helped Luv Ya

Answer 2

Coquinas.  Yup, they're little clams.  At low tide at Santa Monica Beach, California, you can wade out and dig a couple of handfuls of sand that are full of 'em.  Put 'em in a bucket with water, and in a moment you'll see them try to burrow around.

Answer 3

I love those too; they are called "coquinas."