EN

Parathelphusa nagasakti

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Parathelphusa nagasakti faces severe pressure from habitat degradation in its limited freshwater range. Agricultural expansion and urban development have significantly reduced suitable stream and river habitats, while water pollution from agricultural runoff and domestic waste further compromises water quality. The species' restricted distribution makes it particularly vulnerable to localized environmental changes.

Threat summary

Habitat

This freshwater crab inhabits clean streams, rivers, and associated riparian areas in tropical Southeast Asian watersheds. It requires well-oxygenated water with rocky or sandy substrates and depends on intact forest cover for maintaining optimal water quality and temperature conditions.

Forest· major

Other threatened species in GECARCINUCIDAE

EN

Irmengardia nemestrinus

Unknown
EN

Somanniathelphusa zanklon

Unknown
VU

Parathelphusa cabayugan

Stable
VU

Parathelphusa maindroni

Unknown

Threatened in Malaysia

Acropora hemprichiiEN

Acropora hemprichii

Declining
EN

Montipora effusa

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EN

Montipora calcarea

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VU

Buglossoporus magnus

Unknown

Frequently asked questions

Why is Parathelphusa nagasakti classified as Endangered?
Parathelphusa nagasakti is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Parathelphusa nagasakti faces severe pressure from habitat degradation in its limited freshwater range. Agricultural expansion and urban development have significantly reduced suitable stream and river habitats, while water pollution from agricultural runoff and domestic waste further compromises water quality. The species' restricted distribution makes it particularly vulnerable to localized environmental changes.
Where does Parathelphusa nagasakti live?
Parathelphusa nagasakti occurs in Malaysia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Parathelphusa nagasakti?
The main threats to Parathelphusa nagasakti are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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