Gila topminnow are endangered due to predation and competition from the introduced mosquitofish. Research focuses on the development of management measures to keep the introduced mosquitofish under control. Predators of the mosquitofish have also been tried. It has short-finned eels, mosquitofish and common smelt. Fish that typically inhabit sloughs include tidewater goby, California killifish, mosquitofish, and topsmelt. Common names include eastern mosquitofish, plague minnow and eastern gambusia. Introduced fish are carp, brown trout, rainbow trout, redfin perch, mosquitofish and dojo loach. Many ichthyologists believe native species are more effective in population control than mosquitofish. The study reports over 70% Medaka was injured their tail fins by attack from Mosquitofish. Other introduced species, like the carp and mosquitofish, have become major pests. Direct introduction of tilapia and mosquitofish into ecosystems around the world have had disastrous consequences. After birth, newborn mosquitofish are about in length. Male mosquitofish lifespans are considerably shorter than females. Eastern mosquitofish are native to the southeastern United States. Eastern mosquitofish have become an invasive species in Australia.