For tows conducted in the AESOPS site survey and the Ross Sea process surveys, the MOCNESS had nine nets. In a standard tow, a 155 um mesh net was used for net 1 as the single down-cast net, and 333 um mesh nets were used for nets 2 to 9 for sampling 8 strata (depth horizons: 50, 100, 150, 200, 250, 300, 400, 500m). In cruise NBP97-1, during phytoplankton blooming, net 1 was replaced with 505 um mesh net. Zooplankton displacement volume data are normalized and in the unit of ml/1000m3.