Antarctic krill Euphausia superba are important components of the Antarctic marine ecosystem both economicallyand ecologically; to manage this species effectively, their distribution and abundance must be understood. Using theKwang Ja-Ho (3,012 tonnage), a commercial fishing vessel, we conducted acoustic surveys during April 13-24, 2016,to estimate the distribution and population size of krill around the South Shetland Islands of the Antarctic Continent,We used acoustic techniques based on the dB-difference, a method used mainly to classify of marine species. Wefound that Antarctic krill were present in numbers over 99% at six survey stations, with the exception of Station 3,where we only found Electrona carlsbergi. There was no difference in cell size due to frequency differences, but echosignals differed between species: 4.7-12.0 dB for Antarctic krill, and -4.1~0 dB for Electrona carlsbergi.