Occurrences of immortal jellyfish Turritopsis cf. dohrnii from the Mandapam coastal waters of the Gulf of Mannar

Saravanan, Raju and Thirumalaiselvan, S and Sadiq, I Syed and Batcha, S M Sikkander (2022) Occurrences of immortal jellyfish Turritopsis cf. dohrnii from the Mandapam coastal waters of the Gulf of Mannar. Marine Fisheries Information Service, Technical and Extension Series, 253. p. 38. ISSN 0254-380X

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Abstract

During the routine jelly plankton survey along the Mandapam coastal waters, a swarm of hydrozoans was collected in February 2022. These were identified as the immortal jellyfish Turritopsis cf. dohrnii. The hydrozoan jellyfish swarm is the medusa stage of the organism, whereas the larval phase is sedentary and attached to some hard substratum at the bottom. Once a larva metamorphoses into a polyp, it buds off as a jellyfish, causing a bloom.

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