in viña del mar, chile, a large number of shops specialize in selling the same quality of seafood products along the beach frequented by tourists. no individual shop dares charge more than the going price without fearing loss of business to other shops. this exemplifies pure competition.
Any type of marine life that humans consider to be food is considered seafood, with fish and shellfish topping the list. Bivalve molluscs like clams, oysters, and mussels, as well as cephalopods like octopus and squid, are examples of shellfish. Also included are crustaceans like shrimp, crabs, and lobster, as well as echinoderms.
Especially in coastal regions, seafood is a significant source of (animal) protein in many cuisines all over the world. Pescetarians are considered to be semi-vegetarians who solely eat seafood as a source of meat.
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