Gambusia are a concern to DOC because they prey on native insects and fish including whitebait.
Gambusia is one of the world’s most invasive species. A small, robust fish, it breeds and spreads very rapidly in spring and summer. Populations can expand to 17 times their original number within five months.
Gambusia is an unwanted organism under the Biosecurity Act 1993, and it is illegal to possess, release, buy, sell or breed them.