Phalloceros caudimaculatus
Leopard Fish — Photo: By Haplochromis - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=14844315
Not on allowed list but already established in New Zealand.
Leopard Fish
The speckled mosquitofish or the one-spot livebearer (Phalloceros caudimaculatus) is a species of fish native eastern and southern Brazil, northern Argentina, Uruguay and Paraguay. It has also been introduced to Australia, Malawi and New Zealand; primarily for mosquito control, but also as escapees from the aquarium trade. It has been reported as having adverse ecological effects in areas where it has been introduced. The females of this species grow to a total length of 6 centimetres (2.4 in), while males remain smaller.