Univalves, otherwise known as gastropods, live in most all oceans. A sea mollusk is a good example of a univalve.
Univalves
The edible univalves belong to the class Gastropoda. This class includes snails, slugs, and whelks, which are all mollusks with a single shell.
Univalves are a type of mollusk characterized by a single, spiral shell that houses their soft body. Examples of univalves include snails and limpets. They are typically found in marine or freshwater habitats.
Univalves typically move by using a muscular foot to glide over surfaces, leaving a mucous trail behind. Some univalves may also use their foot to burrow into sediment or attach themselves to a hard surface.
Bivalves, univalves, and cephalopods are all types of mollusks. So are gastropods.
Valve refers to a shell, so a bivalve possesses two shells, which are usually hinged together and more or less cover the animal (Class Bivalvia), while univalves have only one shell, and typically leave the muscular foot exposed, unless the animal is capable of withdrawing into its shell (Class Gastropoda).
Gastropods: snails. Gastro means something like 'stomach' or 'belly' and 'pod' means 'foot'. Cephalopods: octopusi. Cephalo means something like 'head'. Bivalves are molluscs with two clasping shells like a clam and univalves have only one.
Some examples of univalves are snails and slugs.
There is no such animal as a "univalve", however "bivalves" are filter feeders and filter seawater through their gills to pick up trace amounts of food.
The class Gastropoda or gastropods (also previously known as univalves and sometimes also spelled Gasteropoda) are members of the phylum Mollusca and are more commonly known as "snails and slugs".
Every mollusk except slugs, which have evolved to not need a shell, has a shell. Snails, clams and other bivalves have an external shell. Octopi, squid and cuttlefish have an internal shell.