no some molluscs dont have shells eg slug
snails...
Nematodes MolluscsLongitudinal musclesMuscular footPseudocoelomatesCoelomatesnever has shell some has shell
An ark shell is a member of the family Arcidae of saltwater clams or marine bivalve molluscs.
Many molluscs, such as snails, and also creatures like turtles and tortoises have shells.
There are six classes of mollusks. The Gastropoda, Monoplacophores,Polyplacophores(chitons) ,Scaphopods, Bivalves, andCephalopods. The Gastropoda are the most varied and the widest collected shells.
When they first appeared, they all had a hard shell to protect them, as they evolved and natural selection removed some of their relatives, this trait was removed and (like octopodes and squid) the shell became a vestigial structure and was removed.
Gastropods, or slugs and snails, as opposed to molluscs with two shells which are bivalves.
Molluscs have a soft, unsegmented body that is typically covered by a protective shell made of calcium carbonate. This shell can vary in shape, size, and color among different mollusc species. In some molluscs, like octopuses and slugs, the shell is reduced or absent, and their bodies are often covered by a layer of skin known as the mantle, which can secrete additional protective materials. The mantle also plays a role in respiration and, in some species, locomotion.
Nudibranchs are members of the group of molluscs known as gastropods, specifically within the subclass Opisthobranchia. These marine snails are characterized by their lack of a shell and their vibrant colors and patterns.
None. Someone previously answered "A Snail!", but snails are not reptiles. They are molluscs and are in a different phylum.
None of the above. A clam is a crustacean.
its their mum