Duck-billed Buntingi
CR

Duck-billed Buntingi

Adrianichthys kruyti

Unknown

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

Overview

Adrianichthys kruyti is a critically endangered species of ricefish that is endemic to Lake Poso, Sulawesi, Indonesia. It was discovered by Max Wilhelm Carl Weber on his Siboga Expedition to Indonesia.

Adrianichthys kruyti faces severe threats from introduced species, particularly the predatory Asian arowana and other non-native fish that compete for resources and prey on juveniles. Water quality degradation from agricultural runoff and domestic pollution in Lake Poso has significantly altered the lake's ecosystem chemistry. Overfishing and destructive fishing practices have further reduced population numbers, while habitat modification from shoreline development continues to eliminate critical spawning areas.

Threat summary

Habitat

This endemic fish inhabits the clear, deep waters of Lake Poso in Central Sulawesi, Indonesia, preferring areas with rocky substrates and moderate water flow. The species is typically found in nearshore zones with adequate vegetation cover that provides both feeding opportunities and protection from predators.

Marine oceanic· majorWetlands (inland)· majorWetlands (inland) - Permanent freshwater lakes· major

Conservation measures underway

Invasive/problematic species controlSpecies recoveryAwareness & communications

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Frequently asked questions

Why is Duck-billed Buntingi classified as Critically Endangered?
Duck-billed Buntingi 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. Adrianichthys kruyti faces severe threats from introduced species, particularly the predatory Asian arowana and other non-native fish that compete for resources and prey on juveniles. Water quality degradation from agricultural runoff and domestic pollution in Lake Poso has significantly altered the lake's ecosystem chemistry. Overfishing and destructive fishing practices have further reduced population numbers, while habitat modification from shoreline development continues to eliminate critical spawning areas.
Where does Duck-billed Buntingi live?
Duck-billed Buntingi occurs in Indonesia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Duck-billed Buntingi?
The main threats to Duck-billed Buntingi are 10.1, 5.3, 8.1, and 9.3. The full IUCN-classified threat record for this species is detailed on the species page.

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