Indian Journal of Geo Marine Sciences Vol. 47 (01), January 2018, pp. 60-66 A note on shallow water octocorallia from Nicobar Islands, India J. S. Yogesh Kumar1*, S. Geetha2, C. Raghunathan3 & R. Sornaraj2 1Marine Aquarium and Regional Centre, Zoological Survey of India, (Ministry of Environment, Forest and Climate Change), Government of India, Digha – 721428, West Bengal, India. 2Research Department of Zoology, Kamaraj College (Manonmaniam Sundaranar University), Thoothukudi – 628003, Tamil Nadu, India. 3Zoological Survey of India (Ministry of Environment, Forest and Climate Change), Government of India, M Block, New Alipore, Kolkata - 700 053,West Bengal, India. [E.mail:
[email protected] ] Received 07 December 2015 ; revised 17 November 2016 Present study revealed the diversity of shallow water soft coral octocorallia (Helioporacea, Alcyonacea, Pennatulacea, Gorgonacea) in Nicobar group of Islands. The sampling made at 11 study sites with help of SCUBA diving to the depth of 5 to 30 m. A total 27 species were found in Nicobar Island. Of which the Alcyonacea was dominant group followed by Gorgonacea, Helioporacea and Pennatulacea at all the study sites which is contributed with result obtained based on Principal Component analysis, De-Treneded analysis and Ternary plot. Bray-Curtis cluster analysis resulted 75% similarity between the study sites in Nicobar Islands. [Key words: Soft coral, Octocorallia, diversity, Nicobar Islands, India] Introduction Nicobar Islands are situated in the Helioporacea (blue coral), Pennatulacea (sea southeast region of Bay of Bengal, between 60-10 pens), and Alcyonacea (soft corals, Stolonifera, N Lat. and 920 - 940 E Long. There are 22 islands gorgonians and telestacea) found in intertidal to in Nicobar group, of which 12 are inhabited.