New Marine Crab Species Discovered in Goa Mangroves by ZSI

Chhapgarus ngankeeae: New Crab Species Highlights Coastal Biodiversity

Researchers from the Zoological Survey of India have discovered a new marine crab species in Goa’s mangrove ecosystems. Named Chhapgarus ngankeeae, the finding highlights the rich biodiversity of India’s coastal habitats and the continued scope for taxonomic exploration.

Naming and Scientific Recognition

The species has been named in honour of Ngan Kee Ng, a distinguished marine biologist from the National University of Singapore. This follows the global scientific tradition of recognising eminent contributors in taxonomy. The discovery reinforces India’s growing role in marine biodiversity documentation.

Habitat and Distribution

Chhapgarus ngankeeae is found in muddy intertidal zones within mangrove forests along India’s western coastline, particularly in Goa. These ecosystems are marked by tidal fluctuations, saline waters, and dense vegetation. Mangroves provide ideal conditions for specialised crustaceans, serving as breeding, feeding, and sheltering grounds.

Distinct Physical Characteristics

The species is relatively small, measuring around 1.6 cm across its squarish, brown, and hairy carapace. Males exhibit a narrower abdomen, with the second and third abdominal segments of equal width. The telson is proportionately broad, while the male reproductive structure shows a distinct chitinous tip with two unequal lobes forming a deep V-shaped indentation—an important taxonomic feature.

Ecological Importance of Mangrove Crabs

Mangrove crabs play a crucial ecological role in coastal systems. They aid in nutrient recycling by decomposing organic matter and contribute to food chains as prey for larger species. Discoveries like this emphasise the ecological value of mangrove habitats, which face threats from urbanisation, pollution, and climate change.

Exam-Focused Points

• Discovered by: Zoological Survey of India (ZSI)

• Species name: Chhapgarus ngankeeae

• Location: Mangrove ecosystems of Goa (west coast)

• Named after: Dr Ngan Kee Ng

• Habitat: Intertidal muddy mangrove zones

• Role: Nutrient recycling and food chain support