Lake Eyre basin

The desert goby, Chlamydogobius eremius, is a small goby endemic to the Lake Eyre drainage basin in South Australia. It does not occur in the salt lake itself but inhabits isolated freshwater springs, flowing artesian bores and ephemeral waterholes. Males are much more colourful than females but can change colour considerably, and they can be aggressive in spawning condition, so it is best maintained alone.

The Pacific blue-eye, Pseudomugil signifer, is the most widely-distributed blue-eye in Australia, found along most of the eastern coastline. Its habitats range from full marine conditions to pure fresh water, and northern populations often grow considerably larger than southern ones. Recent unpublished analyses apparently suggest it may comprise two or more distinct taxa, and wild fish from the northern and southern ends of its range would not hybridise in captive experiments.