Shellfish is a culinary and fisheries term for those aquatic invertebrate animals that are used as food: various species of molluscs, crustaceans, and echinoderms. Although the word is primarily used as a term for marine species, freshwater edible invertebrates (such as crayfish and river mussels etc) are also sometimes grouped with the marine species under the umbrella concept of "shellfish". Want to change wallpaper easy?
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