Emerald Rainbowfish

The emerald rainbowfish, or wanamensis rainbowfish, is another example of a splendid species that might soon only exist due to the aquarium hobby. In native Papua New Guinea, tilapia were introduced as a food source, and since then the emerald rainbow population decreased rapidly. Fortunately, a very effective breeding program in Florida allows these amazing green rainbows to be sustained for the aquarium hobby.

Wanamensis rainbowfish are large, growing up to four inches. These rainbowfish are not common and a bit pricier than their rainbow cousins.

Quick Facts

Care Guide

Tank setup: Rainbowfish are active swimmers, so leave open swimming space along the front, with plants along the back and sides. Use a filter, a heater and a tight-fitting lid, since they can jump.

Feeding: Feed a quality flake or small pellet once or twice a day, only as much as they eat in a couple of minutes. They also enjoy frozen foods like bloodworms and brine shrimp.

Tankmates: They get along with peaceful fish of similar size, such as other rainbowfish, larger tetras, barbs, danios, corydoras and plecos.

Good to know: Emerald rainbows get greener and taller-backed as they mature.