Embley basin

The threadfin rainbowfish, Iriatherina werneri, is a small rainbowfish from southern New Guinea, Cape York in Queensland and the Northern Territory. Although widely traded and produced on a commercial scale, it is quite delicate with rather specific care requirements and is not a recommended beginner's fish. Easily outcompeted for food, and with long-finned males that some common species nip, it is best kept alone or with fishes of comparable size and disposition.

The spotted blue-eye, Pseudomugil gertrudae, is a pseudomugilid from northern Australia, Papua New Guinea and the Aru Islands, eastern Indonesia. Wild populations are isolated from one another and differ in colour pattern, body size and fin morphology, but the fish on sale are of a single, commercially produced ornamental strain. Dark spots in the dorsal, anal and caudal fins separate it from other members of the genus except P. paskai and Pseudomugil sp. 'red neon'.

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 Recent unpublished analyses apparently suggest it may comprise two or more distinct taxa, and wild fish from the northern and southern ends of its range would not hybridise in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.