Mogurnda thermophila

This small freshwater fish, commonly known as the Elizabeth Springs gudgeon, is a member of the family Eleotridae, the gudgeons. It is a compact, bottom-dwelling species with a robust body typical of the genus Mogurnda, adapted to warm, spring-fed waters. Like other gudgeons, it is likely an opportunistic feeder on small invertebrates and plays a role in local aquatic food webs as both predator and prey within its restricted habitat.

Mogurnda thermophila is endemic to Australia, where it is confined to a small number of thermal spring wetlands in an arid desert region of Queensland. Its habitat consists of freshwater outflows and associated marshes, bogs, and swamps fed by artesian springs, environments that are naturally isolated and limited in extent, making the species highly range-restricted.

The species faces multiple ongoing pressures. Livestock grazing and trampling degrade spring habitats and water quality, while agricultural land use alters surrounding vegetation and hydrology. Recreational activities and fire management practices add further disturbance.

Extraction and management of groundwater for agricultural and pastoral use threatens the flow and stability of the springs on which the species entirely depends. Invasive fish species introduced into these isolated systems compete with or prey upon it, compounding the risk posed by habitat alteration.

Conservation measures include fencing of spring habitats to exclude livestock, monitoring of spring flow and water quality, and control efforts targeting invasive species. Some springs are within protected or managed pastoral leases with conservation agreements.

Given its extremely restricted distribution, dependence on a handful of vulnerable spring systems, and multiple compounding threats, the species remains at high risk of extinction, with population trends continuing to decline.

Mogurnda thermophila inhabits thermal springs and associated warm water systems in Australia. The species requires specific temperature ranges and water quality conditions found in these naturally heated aquatic environments.