The term CONCH COUSIN refers to four different types of sea creatures: ABALONE (7 letters), LIMPET (6 letters), SHELL (5 letters), and Seashell (8 letters). ABALONE is a type of mollusk with a single SHELL and a row of tentacles along its foot. Limpets are small, cone-shaped mollusks that cling to rocks in the ocean. Shells are the hard outer covering of mollusks, crustaceans, and other animals. Seashells are the empty shells of mollusks that have been washed up on shore. Finally, ROAR (4 letters) is the sound made by some species of conch.