Mollusc is a group of invertebrate animals, mainly marine in origin. Their bodies do not have an internal skeleton, but may have a hard shell covering the body. These include mussels, oysters, snails, slugs and octopuses.
God called eating shell fish an abomination, before Jesus Christ changed the dietary laws (Luke 22:20). Without realizing this, many proponents of homosexuality claim that it is an abomination only comparable to eating shell fish.