A case of partial ambicolouration combined with the development of an unusual accessory fin in Cynoglossus macrostomus Norman

Abstract

A specimen of Cynoglossus macrostomus Norman with a regenerated injury was noticed in the fish collections obtained from six fathoms depth off Calicut on 27th January 1965. The specimen was interesting in having an accessory fln running across the body in front of the caudal region on the lower or blind side and also in having.normal pigmentation charactwistic of the eyed side on the lower surface in the region between the caudal and the accessory fins. Details of this unusual specimen are given and discussed, this being a first record of the kind for this species.