Because they don't have shells that come off technically they are not shellfish.
Shellfish and crustaceans
Fish have fins and scales, shellfish do not. Shellfish are crustaceans ... totally different species from fish.
Fish, some crustaceans and shellfish.
No they are crustaceans, a type of shellfish or mollusk.
== == A large taxonomic class of arthropods that includes lobsters, shrimps, and crabs.
No they are not an arthropod.
Shellfish can be classified into two main categories: crustaceans and mollusks. Crustaceans include shrimp, crab, and lobster, while mollusks include clams, mussels, oysters, and scallops. These classifications are based on the anatomical features and characteristics of the different species.
The shellfish designation includes mollusks (such as clams, mussels, oysters, and squid) and crustaceans (such as crabs, crayfish, lobsters, and shrimp)
I do not think that these are the same thing, although I think that they are quite similar. Some crustaceans are shellfish though. Thank you. :)
No. Scallops are mollusks and shrimp are crustaceans.
"True crabsare decapod crustaceans of the infraorder Brachyura," (http://en.wikipedia.org/wiki/Crab) and "many varieties of shellfish (crustaceans in particular) are actually closely related to insects and arachnids" (http://en.wikipedia.org/wiki/Shellfish).
Yes, the scientific name for shellfish is Mollusca. Mollusca is a phylum that includes various species such as clams, oysters, mussels, and scallops, which are commonly referred to as shellfish due to their hard protective outer shells.