The document discusses the age and growth of the Antarctic fish Chaenocephalus aceratus, focusing on methods of age estimation through otolith analysis and comparing it to Pseudochaenichthys georgianus. It details growth parameters, reproductive cycles, and feeding behaviors linked to the seasonal production cycles in the Antarctic waters. The research includes data obtained from expeditions between 1979 and 1990 and emphasizes the complexities of age estimation due to variations in their otolith morphology.