PANAJI
In a significant scientific discovery from Goa’s coastline, a new species of marine crab has been identified in the State’s muddy mangrove forests. The species, named Chhapgarus ngankeeae, was discovered by researcher Sameer Kumar Pati from the Zoological Survey of India.
The discovery traces back to Goa, where the main reference specimen of the crab was collected from the muddy backwaters of the Galgibaga River. The small crab, measuring about 1.6 cm, lives in intertidal mangrove habitats -- an ecosystem widely found along Goa’s coast.
Interestingly, the species was identified after Pati re-examined older crab specimens preserved in national collections from Goa, Karnataka and Maharashtra, which were earlier thought to belong to another known species. A detailed microscopic study revealed clear anatomical differences, confirming it as an entirely new species.
Experts say the crab may look small and similar to others at first glance, but it has unique features, especially on its underside that sets it apart. These include a narrower abdomen and a distinctly shaped reproductive organ, which acts like a scientific fingerprint for identification.
“The main reference specimen used to define the new species, the holotype, was collected from beneath a stone in the muddy backwaters of the Galgibaga River in Goa. By analysing the crabs under a stereo microscope, it was realised these specimens had distinct anatomical features that set them completely apart from any known crab,” the study said.
The species has been named in honour of late marine biologist Ngan Kee Ng, recognising her contributions to crab research.
Scientists say the discovery highlights the ecological importance of Goa’s mangroves. These habitats support species like mangrove crabs, which play a key role in maintaining coastal health by recycling nutrients and supporting the food chain.
Researchers have stressed that Goa’s mangrove ecosystems, and those along India’s west coast, are still not fully explored. The finding of Chhapgarus ngankeeae is being seen as a reminder of the hidden biodiversity in these areas and the need for more scientific studies.
Further research, including DNA analysis, is expected to help scientists better understand the evolution and diversity of such coastal species.
