A) Any aquatic invertebrate having a shell or shell-like carapace, esp such an animal used as human food. Examples are crustaceans such as crabs and lobsters and molluscs such as oysters.
B) Any of numerous chiefly marine invertebrates of the phylum Mollusca, typically having a soft unsegmented body, a mantle, and a protective calcareous shell and including the edible shellfish and the snails.
protection device for the mollusk
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No corals have a protective outer shell like a snail or clam, they actually have an inner skeleton, or endoskeleton. It is almost always composed of CaCO2, in English that's calcium carbonate. Snail and clam shells on the other hand are made of calcite or calcium carbonate mixed with calcium phosphate.
The largest shell belongs to the giant clam, Tridacna gigas, whose shell can grow to several hundred pounds, with a length of about 5 feet.
Bugs are invertebrates, which means they do not have a spine. Instead, they have a hard outer shell called an exoskeleton.
They are different because casts and molds are just an imprint (or a copy) of the organism's body. The soft parts of the organism would most likely decay, and the shell, bones, or just the outer hard parts would be fossilized.
Snails do not have bones but they do have a hard outer shell, like a clam, known as an exoskeleton.
can cherrystone clams be eaten on the half-shell
I assume calm means clam? In which case, a clam does have a hard external (skeleton?) shell of calcium carbonate. The shell is known as an exoskeleton.
a hard shell and burying themselves in the sand
A clam shell
There are not any adult moths that have a hard outer shell. However, a pupa from the Gypsy Moth do have a hard outer shell for protection until it hits adulthood.
Possessive form of the words clam shell: clam shell's
Spiders do not have bones. They have exoskeletons which is a hard outer shell.
An egg with an outer hard shell is called the cuticle or bloom. It helps keep out bacteria and dust.
no..... slugs are mollusks and they don't have a shell
the crust
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