Queensland Lungfish

Neoceratodus forsteri is one of the oldest surviving vertebrate lineages, retaining a body plan largely unchanged for over 100 million years. It has a robust, olive-to-brown body covered in large scales, paddle-like fins, and a single lung derived from its swim bladder, allowing it to gulp air at the surface when dissolved oxygen levels drop. Individuals can live for decades and grow over a meter in length.

As an omnivorous bottom-dweller, it feeds on invertebrates, frogs, and plant matter, playing a role as both predator and detritivore within slow-moving freshwater systems.

The species is restricted to a small number of river systems in southeastern Queensland, Australia, particularly the Mary and Burnett River basins, with additional populations established through translocation. It inhabits permanent rivers, streams, and inland wetlands, favoring deep, slow-flowing pools with aquatic vegetation for spawning.

Its threatened status stems from cumulative pressures rather than a single cause: dam construction and water management have fragmented habitat and altered flow regimes critical for breeding; agricultural runoff and effluent degrade water quality; invasive species and disease introduce additional stress; and riverbank development, livestock access, and incidental capture in fishing gear further reduce suitable habitat and recruitment.

Conservation measures include legal protection under Australian law, restrictions on collection and export, habitat rehabilitation projects, fish passage installations at some barriers, and captive breeding and translocation programs to establish additional populations.

Given its long lifespan and current stable population trend, the species faces a lower immediate extinction risk than many threatened fishes, but ongoing river modification and habitat degradation mean long-term recruitment and range security remain uncertain without sustained management.