East Siberian Sea main land]. "On the North." A line from the Northernmost point of Wrangel Island (179°30'W) to the Northern sides of the De Long Islands (including Henrietta and Jeannette Islands) and Bennett Island, thence to the Northern extremity of Kotelni Island. "On the East." From the Northernmost point of Wrangel Island through this island to Cape Blossom thence to Cape Yakan on the main land (176°40'E). Because it is open towards the Arctic Ocean in the north, the main gulfs of the East Siberian Sea, like the Kolyma Bay, the Kolyma Gulf and the Chaunskaya Bay, are all located in its
East Siberian Sea scarce due to the harsh climate. The summer plankton bloom is short but intense, producing 5 million tonnes of plankton in August and September, whereas the annual production is 7 million tonnes. The nutrients in water are mostly provided by river discharges and coastal erosion. The plankton species are dominated by the Pacific species of copepods. The sea shores and icefields host ringed seals ("Phoca hispida"), bearded seals ("Erignathus barbatus") and walruses ("Odobenus rosmarus") along with their predator, polar bear ("Ursus maritimus"). Birds include seagulls, uria and cormorants. Sea waters are often visited by bowhead whale ("Balaena mysticetus"), gray whale