Abstract
Three hundred and thirty-seven specimens of the zoarcid fish, Melanostigma pammelas, collected between December, 1950 and December, 1969 from bathypelagic waters off southern California, were examined for their parasites. Incidences of infection were: digentic Trematoda 61%, Myxosporida 39%, larval Nematoda 9%. Two adult trematodes are described: Fellodistomum melanostigmum nov. sp. from the intestine, and Aponurus pacificus nov. sp. from the stomach. This parasite record is markedly unlike the typical record reported for eastern Pacific mesopelagic fishes in which many larval nematodes and few, if any, adult trematodes were found. Our long-term objective is to explain parasite pattern differences in the deep ocean in terms of their biological and physical environments. Our initial purpose is to determine the numbers and kinds of parasites in M. pammelas.
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