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Seafood refers to any crustacean, mollusk or fish that is caught in the water and eaten. In a lot of countries, sea vegetables and seaweed also count as seafood. The cultivation of seafood is known as aquaculture.


Clams are in the same family as mussels, but they live buried under the sand. Most clams are oval, small and light in color, but some clams, like razor clams, are long while others, like the giant clam, can grow huge.


There are about 7,000 species of crab, a crustacean that lives in all of the world's oceans. Crabs can go from being only a few millimeters big, like the pea crab, to about 13 feet wide, like the Japanese spider crab.


Flatfish are funny-looking fish that lie flat and camouflage against the sea bottom, with both of their eyes on top of their heads! Famous flatfish that are good to eat are: halibut, turbot, sole and flounder.


Lobsters are clawed crustaceans that live all over the world. They are protected by a hard shell, or exoskeleton, that they must shed, or molt, in order to grow bigger. Lobsters turn red when cooked because the cooking process exposes their natural pigments, the same ones that make carrots orange.


There are freshwater and saltwater mussels living all over the world. They are bivalves that attach themselves to rocks in intertidal zones, meaning the live in the space that is exposed during low tide and covered in water in high tide, like tidepools.


Salmon fish spawn in fresh water, migrate to saltwater and then come back to fresh water to lay their eggs and reproduce. As a food, salmon is high in Omega-3 fatty acids and protein, making it a healthy food full of the good kind of fats.


Scallops are bivalves, or mollusks with shells, and live in all the world's oceans. Their edible muscle is thicker than any other bivalve's because scallops are the only mollusks who can open and close their shells to move around.


Shrimp are crustaceans and come in about 2,000 different species. When shrimp are eaten, they are high in protein, calcium and cholesterol. They are different from prawns as a species, but not many people know or recognize the difference.


Trout are freshwater fish that are in the same family of fish as salmon. They are mostly found in rivers and lakes and put up quite the fight when caught on the line. Because of this, they are very popular with fishermen and fly fishermen.


Tuna are fast-moving fish that live all around the world. They've been clocked at speeds of up to 45 miles an hour and are very popular both canned and raw. In Japanese cuisine, tuna or ahi sashimi, or raw slices, is a staple.