The Running River Rainbowfish (RRR) is a recently recognised taxa that is in urgent need of conservation action and is currently listed by the Australian Society for Fish Biology as critically endangered. Currently, there are at least three species of rainbowfish listed as threatened or critically endangered by the Australian Society for Fish Biology for which
Eastern Rainbowfish is considered as the major threatening process due to potential hybridisation. The underlying processes of these invasions and subsequent hybridisation are not yet understood, but in most cases the root of the problem has been the translocation of eastern rainbowfish outside its natural range. A captive breeding and translocation stocking program was undertaken to save RRR. This situation provided an opportunity to examine the processes affecting introduction success, not only negative introductions such as the case of the Eastern Rainbowfish, but also conservation based introductions. These introductions also provided an opportunity to see how fast a rainbowfish species may spread throughout a new system. To do this we tested the effects of predator training on released fish, and conducted mate choice experiments to test the preferences Eastern Rainbowfish and RRR.