The Pacific walrus rookery in Keniskin Bay in the north of Chukotka is the largest in the world. And this is almost the only place in Chukotka where mammals sailed for a short rest in 2021. Almost all other similar territories in the north of Chukotka turned out to be empty due to the presence of ice, which is an alternative to the coastal tundra. Walruses have been monitored during migration to Keniskin for the last decade. Isolation from the outside world is at a one-hundred-percent level here.