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The behavior of a school of margates, Haemulon album Cuvier, was studied with hydrophones and an underwater television system. Margates entered the acoustic-video underwater observation area about sunrise. They schooled during the day and dispersed in late afternoon. Feeding
and other activity increased considerably at night. Common food organisms included bivalve mollusks, crustaceans, and small fishes. Nighttime and daytime diets were of similar composition. The sounds of feeding and other activities were recorded on magnetic tapes. Underwater television observations
were made of margates schooling, feeding, and being preyed upon by amberjacks and barracuda. Identifiable natural characters and Petersen disc tags were used to determine that after nocturnal foraging, most margates returned to school in the same place each morning. Large margates, however,
were not observed to school.
The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.