Results of composition and relative abundance of zooplankton from the Bransfield Strait during the austral summer 1985 are given. In comparison with the previous season, an important zooplanktonic heterogeneity was found in Nelson Strait area and at the entrance of the Gerlache Strait, being copepods, euphausiids and chaetognaths the main groups. In the first area, copepods and euphausiids larvae were predominant, as long as in the second one, copepods and appendicularia were the most abundant groups.