New record of an oyster species from Chilika Lagoon, Odisha, north-western Bay of Bengal


  • Chilika Development Authority, Bhubaneswar
  • Chilika Development Authority, Bhubaneswar
  • Chilika Development Authority, Bhubaneswar
  • Zoological Survey of India, M-Block, New Alipore, Kolkata - 700 053
  • Zoological Survey of India, M-Block, New Alipore, Kolkata - 700 053
  • National Centre for Polar and Ocean Research, (NCPOR-MoES), Vasco-Da-Gama, Goa - 403804
  • Divisional Forest Office, Athagargh Wildlife Division, Odisha



Chilika Lagoon, Isognomon ephippium, Mangrove, New Record, Outer Channel.


This paper reports first record of a marine bivalve Isognomon ephippium Linnaeus from the Chilika lagoon as well as mainland of India since this species is highly restricted to Andaman waters only. Actual cause of occurrence is still unknown however, it is believed that passive migration of larva/juvenile through high energetic cyclonic water current might have helped to settle in Chilika lagoon or else it is carried out by the ballast water. The observed species contains many of the miniature pearls within it that provides new prospective to pearl industry. Nevertheless, occurrence of this reef based and mangrove linked species in the Chilika indicates highly adoptive nature of the lagoon ecosystem for the congregation of diverse marine benthic fauna.


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Author Biographies

Debasish Mahapatro, Chilika Development Authority, Bhubaneswar

Project Fellow

S. Nanda, Chilika Development Authority, Bhubaneswar

Chief Executive and PD-ICZMP,Odisha

S. Gowda, Chilika Development Authority, Bhubaneswar

Additional Chief Executive and Nodal Officer

B. Tripathy, Zoological Survey of India, M-Block, New Alipore, Kolkata - 700 053


S. S. Mishra, Zoological Survey of India, M-Block, New Alipore, Kolkata - 700 053


S. Lenka, Divisional Forest Office, Athagargh Wildlife Division, Odisha





How to Cite

Mahapatro, D., Nanda, S., Gowda, S., Tripathy, B., Mishra, S. S., Mishra, R. K., & Lenka, S. (2020). New record of an oyster species from Chilika Lagoon, Odisha, north-western Bay of Bengal. Records of the Zoological Survey of India, 120(4), 313–321.





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