Rare Marine Discovery in Mumbai: First-Ever Sighting of Discodorid sebuensis Sea Slug in India at Haji Ali Coast
A rare marine species, Discodorid sebuensis sea slug, was sighted for the first time in India near Haji Ali, Mumbai on April 21, 2026. Discovered by wildlife enthusiasts Vaibhav Haldipur, Amey Parkar, and Johnson Varki, the finding highlights unexplored marine biodiversity along India’s western coast and its ecological significance for future research.
The unusual marine organism was first observed by wildlife enthusiasts Vaibhav Haldipur, Amey Parkar, and Johnson Varki. The three friends were on a routine coastal exploration near the Haji Ali area when they encountered the distinct and unfamiliar sea slug. Recognizing its potential scientific importance, they documented the sighting for further verification.
According to marine biology experts, the species belongs to the family Discodorididae and is classified under dorid nudibranchs, a group of soft-bodied marine gastropod mollusks commonly found in tropical Indo-West Pacific waters.
These organisms typically inhabit coral reef ecosystems and sponge-rich marine environments. While their presence is widespread in tropical seas, this marks the first recorded occurrence of this species along the western coast of India.
Experts have noted that the discovery aligns ecologically with the habitat conditions of the region, even though it had not been previously documented in Indian waters.
Vaibhav Haldipur reported that the identification of the sea slug was based on its distinct morphological characteristics. The key features observed included a flattened and slightly compressed body structure, small raised bumps across the dorsal surface, a robust external texture with fine supporting structures, and a thin central line extending from the rhinophores to the gills.
These features are consistent with the genus Discodoris, enabling researchers to confirm its classification as Discodorid sebuensis.
This discovery adds a new dimension to the study of marine biodiversity along the Indian coastline. Experts believe it indicates that the western coastal waters of India may still host several undocumented or rarely observed marine species.
Further scientific research is expected to provide deeper insights into the distribution, ecological behavior, and environmental role of this species, potentially reshaping understanding of marine ecosystems in the region.

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