FT Vol.50(4)

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Co-infection of Yellowtip Halfbeak Fish (Hemiramphus marginatus) with Isopod and Copepod Parasites from the Coromandal Coast, India
(Society of Fisheries Technologists (India)Cochin, 2013) Sethi, Satyanarayan; Jithendran, K. P.; Kannappan, S.
In some fishes, parasitic associations are possible, but rare, including simultaneous associations of several large parasites (Trilles et al., 1996). Cymothoids and Digeneans are frequently associated with fish. This is the first report on the occurrence of an infection by two parasitic crustaceans in the halfbeak fish from the southeastern coast of India. Such double parasitism, involving a branchial cymothoid and a pennellid copepod, is probably uncommon, but not accidental. Cymothoids infect several species of fish. Mance (juvenile parasitic stages of cymothoid) feed voraciously and easily kill fry and fingerlings. Adultsparasite which are permanently attached to the hosts, result in stunted growth and also affect reproduction. Parasites in the gill chamber are usually associated with deformed gills. This may lead to severe economic loss in the commercial species of the marine fishes of India