Soviet data on the abundance and geographical distribution of krill in the Southern Ocean are analytically reviewed. The location of heavy krill concentrations around Antarctica is discussed on the basis of the peculiarities of its biology and environmental conditions. Krill consumption by the major groups of predators is assessed taking into account the results of Soviet investigations as well as data published in other countries. An allowable catch of 25-30 million tons of krill is suggested on the basis of direct sampling in areas of krill concentration. Such annual catch of krill is considered safe for the status of stocks of krill and dependent consumers.