New host and new geographical record of the ciliate parasites of ornamental fish, from Arunachal Pradesh for the first time in India.

Ornamental fish culture is growing to a prosperly in India. India earned lot amount of money from this business but unfortunately the ornamental fishes are facing lots of problem due to the parasitic infestation. While surveying, some ciliate parasites namely, (Lom in Arch Protistenkd 112:153-177, 1970) and (Davis in US Dept Interior Fish Bull 51:1-29, 1947) Lom (Acta Parasitol Polon 7:573-590, 1959) have been identified from ornamental fish from Arunachal Pradesh, India. The species have been identified according to the guidelines of Lom (J Protozool 5:251-263, 1958). Through out the world records of many trichodinid infection was documented but no such investigation have been carried out earlier in Arunachal Pradesh. The present study embodies the morphology and morphometrics of trichodinid ciliates of ornamental fish, collected from the Subansiri river of Arunachal Pradesh for the first time in India.