Haracteristic of the biology of the European flounder Platichthys flesus (Pleuronectidae) of the lower reaches of the Mezen river according to research data 2010–2016

The biological characteristics of the European flounder lower reaches Mezen River are described. maximum age 18 years was noted, zoological length and weight: 41,2 cm 680 g. size weight individuals for each given. relationship between mass river body is described by a power function. Single maturing were caught at 4 in females 3 males. bulk fish ripens 4–5 age. Food items marked: amphipods, bivalve mollusks, insect larvae, including brooks, sipunculids, objects. average absolute fecundity 550 thousand eggs.