CR

Typhleotris pauliani

Unknown

Overview

Typhleotris pauliani is a critically endangered species of fish in the family Milyeringidae that is endemic to Madagascar, where it is only known from a few caves and sinkholes in the southwestern portion of the island. This blind cavefish lacks pigmentation and can reach a standard length of 7.1 cm (2.8 in). It feeds on invertebrates and guano.

Part of its range receive some protection, but the species is threatened by disturbance from recreational activities and collectors of guano. The specific name honours the French entomologist and former deputy director of the Institut de recherche pour le développement in Madagascar, Renaud Paulian (1913-2003), who collected the type specimens as well as contributing a lot to the knowledge of the biogeography of the western Indian Ocean.

Typhleotris pauliani faces severe threats from groundwater extraction and pollution in its extremely limited cave habitat range in Madagascar. The species' restriction to underground aquatic systems makes it particularly vulnerable to water table changes and contamination from agricultural runoff and human settlements. Mining activities and deforestation in the watershed above its cave systems further threaten water quality and flow patterns essential for its survival.

Threat summary

Habitat

This blind cave fish inhabits underground freshwater systems and subterranean rivers in limestone caves of Madagascar. It is restricted to dark, oxygen-poor aquatic environments within karst cave networks where it has evolved specialized adaptations for life without light.

Marine coastal/supratidal· majorWetlands (inland) - Permanent rivers/streams· majorCaves and subterranean habitats· major

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Frequently asked questions

Why is Typhleotris pauliani classified as Critically Endangered?
Typhleotris pauliani 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. Typhleotris pauliani faces severe threats from groundwater extraction and pollution in its extremely limited cave habitat range in Madagascar. The species' restriction to underground aquatic systems makes it particularly vulnerable to water table changes and contamination from agricultural runoff and human settlements. Mining activities and deforestation in the watershed above its cave systems further threaten water quality and flow patterns essential for its survival.
Where does Typhleotris pauliani live?
Typhleotris pauliani occurs in Madagascar. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Typhleotris pauliani?
The main threats to Typhleotris pauliani are 6.1, ai-1, ai-2, and ai-3. The full IUCN-classified threat record for this species is detailed on the species page.

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