Observation on an isopod parasitizing the edible fish Parastromateus niger in the Parangipettai coast of India.

Cymothoidae are big parasites on fishes and often they are host specific. This study reports that in India, the Black pomfret (Parastromateus niger), a highly edible marine fish belonging to the family Carangidae, is the type host of Cymothoa eremita (Isopoda, Cymothoidae). Among one hundred and sixty fish examined from April to July, 2010 in Parangipettai coastal waters, only three female specimens were infested in June, 2010. It seems that such parasitism depends particularly on the season and on the host sex.

Identification of Parapenaeopsis stylifera, a new host for Epipenaeon ingens.

Epipenaeon ingens (Isopoda: Bopyridae) is reported for the first time from Parapenaeopsis stylifera (Decapoda: Penaeidae) in South India. According to the month the parasitic prevalence ranged from 0.0 to 2.9%. A characteristic bulge of the branchial chamber, growth retardation and degenerated sex organs were observed in the infested shrimp.

On the occurrence of a double parasitism (copepod and isopod) on the anchovy fish in India.

A double parasitism (isopod and copepod) on anchovy fish, Stolephorus commersonii Lacepede, 1803 was recorded from Parangipettai (India) coastal waters during June, 2004. This is the first report from this region and the infestation is discussed in relation to environmental parameters in this short communication.