Trigonostigma somphongsi
CR

Trigonostigma somphongsi

Local name: Somphongs’s Rasbora

Declining

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Trigonostigma_somphongsi

Overview

Trigonostigma somphongsi is a species of ray-finned fish in the genus Trigonostigma. It is endemic to Thailand. It is threatened by habitat loss.

Trigonostigma somphongsi faces severe population decline primarily due to extensive deforestation and habitat conversion throughout its limited range in Southeast Asia. The species' specialized requirements for pristine forest streams make it particularly vulnerable to logging operations and agricultural expansion. Water pollution from agricultural runoff and urban development further degrades the aquatic ecosystems this fish depends upon for survival.

Threat summary

Habitat

This species inhabits clear, fast-flowing forest streams and tributaries in pristine tropical rainforest environments. It requires well-oxygenated waters with specific temperature and pH conditions found only in undisturbed forest watersheds.

FRESHWATER· major

Conservation measures underway

Habitat & natural process restorationSpecies recoveryEx-situ conservation

Other threatened species in DANIONIDAE

EN

Naggsi Rasbora

Rasbora naggsi

Declining
VU

Laubuka khujairokensis

Unknown
EN

Brevibora dorsiocellata

Declining
VU

Malabar Hatchet Chela

Laubuka fasciata

Unknown

Threatened in Germany

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Large Tree-chernes

Dendrochernes cyrneus

Unknown
CR

Cheilosia varnensis

Unknown

Frequently asked questions

Why is Somphongs’s Rasbora classified as Critically Endangered?
Somphongs’s Rasbora is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Trigonostigma somphongsi faces severe population decline primarily due to extensive deforestation and habitat conversion throughout its limited range in Southeast Asia. The species' specialized requirements for pristine forest streams make it particularly vulnerable to logging operations and agricultural expansion. Water pollution from agricultural runoff and urban development further degrades the aquatic ecosystems this fish depends upon for survival.
Where does Somphongs’s Rasbora live?
Somphongs’s Rasbora occurs in Germany, and Thailand. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Somphongs’s Rasbora?
The main threats to Somphongs’s Rasbora are 1.1, 5.3, 7.3, and ai-1. The full IUCN-classified threat record for this species is detailed on the species page.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.