THE SEA OF JAPAN 



779 



when it dries out, is turned into a soft carpet some few metres wide, stretching 

 for kilometres along the coast' (P. Schmidt, 1948). 



Among the bottom-living fish of the Sea of Japan, the cod Gadus morrhua 

 macrocephalus and Theragra chalcogramma, and Soleidae, Cynoglossidae 

 and other flatfish except halibut are those usually fished for. 



Some pelagic fish enter the Sea of Japan for feeding and reproduction, 



Ca/anus 



Euphausiacea 



Fig. 384. Diagram of Feeding correlation be- 

 tween the herring and other organisms. 1 Fish 

 fry; 2 Caplin; 3 Starling; 4 Navaga; 5 Cod; 

 6 Shark; 7 Skumbria; 8 Pink salmon; 9 Jelly- 

 fish. 



wintering, however, outside its boundaries (sardines, mackerel). In January 

 to March the main mackerel aggregations of the Sea of Japan are concen- 

 trated within the area of the Tsushima Strait, at a temperature of 12° to 15°. 

 As the temperature rises mackerel penetrates the Sea of Japan along its 

 eastern and western shores, reaching the Tartary Strait by August and the 

 beginning of September. With the cold autumn weather mackerel moves in 

 the reverse direction. Mackerel spawns in the coastal zone, in inlets and bays, 

 from April to the middle of June, and in Peter the Great Bay in June and July. 



