Mollusk is another way to say shellfish. This is a loosely defined group ranging from snails and clams to Squid and Octopi. It's so broad a group in fact mcwdn.org/mollusks describes it like this: "Shellfish are not all fish and many of them live on land. Not all of them have shells. They are not fish, although many of them live in the water."
:) What?
