New potential host for Ryukyua globosa (Crustacea, Isopoda, Cymothoidae) from Parangipettai, Southeast coast of India.

In the present study Ryukyua globosa parasitic isopod on the marine fishes of the Parangipettai coast are reported. R. globosa was found attached in the gill chamber of Sardinella gibbosa. The attachment position of Ryukyua species differs from that of other member of this genus. Until now, R. globosa was only reported on Amblygaster sirm and A.leiogaster. S.gibbosa is a new host record for R.globosa. R. globosa, branchial parasites, already known from Japan and is now recorded from the Southeast coast of India.