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<p>This paper investigates a jellyfish beach stranding event observed along the northeastern coast of India at Puri (a blue-flag-beach) subsequent to the landfall of tropical cyclone Mocha. Taxonomic analysis revealed the jellyfish species as <i>Netrostoma</i> sps. Water temperature was found to play a pivotal role in making conducive conditions, resulting in jellyfish aggregation in the coastal waters. The occurrence of Marine Heat Wave (MHW) conditions a month prior to the stranding event, led to hypothesize that the MHW provided conducive conditions for the jellyfish growth and triggered its rapid aggregation. Sustenance of conjugative cyclonic and anticyclonic eddies for ~ 6 weeks prior to the stranding event implicated providing a conducive bed with enhanced food supply attributed to the thermal front. The crossflows (winds and currents) due to the surface divergence resulted in significant mass transport of surface water toward the coast during cyclone Mocha, facilitating the massive jellyfish aggregation and resultant beach stranding.</p>

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Linking a Tropical Cyclone and Ocean Conditions to Jellyfish Stranding Event on the Indian East Coast

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Amit Kumar Jena,
  • Manasa Ranjan Behera,
  • Suchismita Srichandan,
  • Sanjiba Kumar Baliarsingh,
  • Sachiko Mohanty,
  • Alakes Samanta,
  • V. K. Srineash

摘要

This paper investigates a jellyfish beach stranding event observed along the northeastern coast of India at Puri (a blue-flag-beach) subsequent to the landfall of tropical cyclone Mocha. Taxonomic analysis revealed the jellyfish species as Netrostoma sps. Water temperature was found to play a pivotal role in making conducive conditions, resulting in jellyfish aggregation in the coastal waters. The occurrence of Marine Heat Wave (MHW) conditions a month prior to the stranding event, led to hypothesize that the MHW provided conducive conditions for the jellyfish growth and triggered its rapid aggregation. Sustenance of conjugative cyclonic and anticyclonic eddies for ~ 6 weeks prior to the stranding event implicated providing a conducive bed with enhanced food supply attributed to the thermal front. The crossflows (winds and currents) due to the surface divergence resulted in significant mass transport of surface water toward the coast during cyclone Mocha, facilitating the massive jellyfish aggregation and resultant beach stranding.