10/09/2026
Rediscovery of Mugilogobius chulae (Smith, 1932) after 90 years and new goby records from northern Sri Lanka
Full Article: https://doi.org/10.59120/drj.v17i3.627
First published: 07 September 2026 (Online)
The story of this goby goes back to 1936, when the renowned Sri Lankan zoologist P. E. P. Deraniyagala described a new ‘freshwater’ goby from Sri Lanka as Vaimosa valigouva in his paper, “Two New Fishes from Ceylon,” published in The Ceylon Journal of Science. The species was described from Point Pedro, Jaffna, its type locality, and this remained its only known record from Sri Lanka.
For decades afterwards, the species disappeared from the scientific record. Civil conflict, restricted access to the northern region, the presence of landmines, and limited opportunities for field surveys severely constrained biodiversity research in northern Sri Lanka. With no subsequent confirmed records from elsewhere on the island, the species was eventually excluded from national fish inventories and became largely forgotten in the country’s ichthyological literature. Later, following taxonomic revisions, Vaimosa valigouva was synonymised with Mugilogobius chulae (Smith, 1932), which is currently the valid name.
During a recent expedition to northern Sri Lanka, we unexpectedly encountered an unidentified goby at Karainagar, Karaitivu Island, in close proximity to the Jaffna Peninsula and surrounding archipelago. Following detailed morphological examination, we confirmed the identity of the specimens!
Here, we report the rediscovery of the Yellow-stripe Goby, Mugilogobius chulae, in Sri Lanka after 90 years since its only historical record. This record also represents one of the westernmost known occurrences of the species in the Indian Ocean.
But this was not the only discovery. We also report the first verified northernmost record in Sri Lanka of the Black-spotted Snubnose Goby, Pseudogobius melanostictus (Day, 1876), a species with no recent, verified records from the island, with previous records restricted primarily to the western coast estuarine habitats of Sri Lanka.
Our findings extend the known distributions of both species, contribute important records to the national ichthyofaunal inventory, and underscore the potential for further discoveries in the still under-explored inland habitats of northern Sri Lanka. This rediscovery is also a reminder of how much remains to be discovered in regions where decades of limited access have left gaps in our understanding of Sri Lanka’s biodiversity.
Special thanks to Dr. Helen Larson, Rohan Pethiyagoda, Madura De Silva, Dr. Kasun Bandara, and Neluka Fernando for their generous support and assistance in various aspects of this study.