I love to eat shellfish, its one of my fav kinds of food
It is good. Shellfish is a culinary and fisheries term for exoskeleton-bearing aquatic invertebrates
Yes my favorite is shrimp
I have herd  some kinds are found in freshwater.
Lobster is delish as well!
They are! a few species of land crabs are eaten, for example "Cardisoma guanhumi"
I have never heard of that are they good?
Shellfish
Shellfish is a colloquial and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans, and echinoderms. Although most kinds of shellfish are harvested from saltwater environments, some are found in freshwater. In addition, a few species of land crabs are eaten, for example "Cardisoma guanhumi" in the Caribbean. Shellfish are among the most common food allergens.
Despite the name, "shellfish" are not actually fish, but are simply water-dwelling animals. Most
refer to anything from clams and oysters to lobster and shrimp. For regulatory purposes it is often narrowly defined as filter-feeding molluscs such as clams, mussels, and oyster to the exclusion of crustaceans and all else.
Although the term is primarily applied to marine species, edible freshwater invertebrates such as crayfish and river mussels are also sometimes grouped under the umbrella term "shellfish".
Although their shells may differ, all shellfish are invertebrates. As non-mammalian animals that spend their entire lives in water they are