Cockle: Any of various bivalve mollusks of the family Cardiidae, having rounded or heart-shaped shells with radiating ribs.
Mussel: Any of several marine bivalve mollusks, especially the edible members of the family Mytilidae and in particular Mytilus edulis, a blue-black species raised commercially in Europe. Mussels are often found attached to rocky surfaces or the sides of ships. Irish traditional Comment or Share Your Own Nursery Rhymes |


