Praveen Raj Changarangath


PhD Candidate, PhD Student


Research groups

Short info

My research centers on the diversity, distribution, ecology, and taxonomy of gelatinous zooplankton, with special focus on planktonic cnidarians.

As part of my PhD, I am investigating the diversity, distribution patterns, and taxonomic uncertainties of siphonophores in Norwegian waters. This study employs an integrative approach, combining morphology-based taxonomy with advanced molecular techniques. Additionally, I am exploring the biogeographic patterns of specific siphonophore genera to uncover their distribution and evolutionary history.


1. Purushothaman, J., Praveen Raj, C., Prasad, H., Bhowal, A., Siddique, A., Raghunathan, C., Banerjee, D. 2022. Handbook on Indian Scyphozoa, Handbook and Pictorial Guide, 74: 9-155 (Published by Director, Zool. Surv. India, Kolkata, India).

Research Papers
1. Siddique, A., Raj, C. P., Bhowal, A., Purushothaman, J., Athira, A., & Azeez, A. (2022). First record of Acromitus flagellatus (Maas, 1903) (Cnidaria: Scyphozoa) swarm from the world’s largest deltaic ecosystem, the Sundarbans, India. Regional Studies in Marine Science, 55, 102555. 
2. Raj, C. P., Siddique, A., Bhowal, A., Prasad, H., & Purushothaman, J. (2022). Report of Chrysaora caliparea (Reynaud, 1830) Swarm from the Coastal Waters of Odisha, Western Bay of Bengal. National Academy Science Letters, 45(6), 491-495. 
3. Siddique, A., Basu, S., Prasad, H., Bhowal, A., Changarangath, R. P., Purushothaman, J. Morphological and molecular characterisation of ghost jellyfish Cyanea nozakii Kishinouye, 1891 (Cnidaria: Scyphozoa) from Bay of Bengal, Indian Ocean. Regional Studies in Marine Science, 68, 103271. 

Conference Proceedings
1. Raj, C. P, Siddique, A., Bhowal,A., Prasad, H., and Purushothaman, J (2022). Massive outbreak of sea nettles from the coastal waters of Odisha, Western Bay of Bengal. 4th Research Symposium of Ocean University of Sri Lanka, 2022.
2. Purushothaman, J., Raj, C. P., Prasad, H., Banerjee, D. (2023). Environmental influence on the mesozooplankton community structure from Krossfjorden, Svalbard archipelago. National Conference on Polar Science - 2023, Goa, India.
3. Prasad, H., Raj, C. P., Purushothaman, J., Banerjee, D. (2023). Mesozooplankton community structure in Kongsfjorden: Investigating the environmental influence and depth wise variations. National Conference on Polar Science - 2023, Goa, India. 
5. Raj C, P., Prasad, H., Purushothaman, J., Parameshwaran, U. (2023) Kleptoparasitism and Nursery Habitats: An Intriguing Symbiotic Association Between Cyaneid Jellyfish and Ophiocnemis Brittle Stars. 7th International jellyfish bloom symposium Book of Abstracts, pp: 108.
6. Raj C, P., Prasad, H., Siddique, A., Bhowal, A., Purushothaman, J., Aparna T. P., George, A. (2023) Seasonal Dynamics and Environmental Influences on Planktonic Hydrozoan Populations in the Northern Bay of Bengal. 7th International jellyfish bloom symposium Book of Abstracts. pp: 181.