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common name for any member of the unique and widespread order Pleuronectiformes containing over 500 species (including the flounder, halibut, plaice, sole, and turbot), 130 of which are American.
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(Pleuronectes [or Platichthys] flesus luscus, a fish of the flounder family; a subspecies of the fluke. Its body length reaches 30 cm; in some estuaries a dwarf form is found. It is widespread in the Black and Azov seas and sometimes frequents the estuaries and lower reaches of rivers. It achieves sexual maturity in the third year of life and casts its roe from the end of January to the middle of March; the spawn may be as large as 1 million eggs. It feeds on benthic invertebrates—mollusks, crustaceans, and worms—and small fishes. It is of minor commercial importance and is caught mainly in the Sea of Azov.