Iriatherina werneri - Threadfin Rainbowfish
Described from ‘Merauke, Irian Jaya, Indonesia’ which corresponds to modern day Merauke Regency, Papua province, Indonesia, on the island of New Guinea. It’s distributed along a relatively short section of New Guinea’s southern coast, between Merauke and the mouth of the Fly River across the border in Papua New Guinea, and in the latter watershed has been recorded over 500 km inland. Populations are also known from Lakes Bosset and Kala.
In Australia records exist from numerous river basins of the Cape York Peninsula, Queensland state, plus the Northern Territory to the west, including the Arafura wetland in Arnhem Land. The fish exhibit some differences in colour pattern and fin morphology depending on locality, but wild examples are virtually unknown in the aquarium hobby with all those seen on sale produced on a commercial basis.