The present investigation deals with systematic observation of the cestode parasites Tylocephalum
Linton, 1890, that is, T. damodarae n.sp. of marine fish Dasyatis walga Muller and Henle, 1841 from
West Coast of Maharashtra which is most pathogenic. The present worm comes closer to all the known
species of the genus Tylocephalum in general topography of organ but differs due to scolex globular
anteriorly and quadrangular posteriorly, presence of short neck, mature proglottids three to four times
longer than broad, testes 60 to 70 in numbers and pre-ovarian, cirrus pouch oval, elongated placed
below the middle of the proglottids, cirrus straight, vas deferens long coiled, genital pores are large,
sub-marginal, irregularly alternate, vagina anterior to cirrus pouch, ovary ‘U’ shaped and vitellaria are
granular in shape.