Black Fin Rainbowfish – Upper Katherine River (Melanotaenia splendida)

these come from the Upper Katherine River in the Northern Territory of Australia. They have bright red stripes along their bodies and develop dark black fins when happy. They look similar to M. australis, however, genetic evidence suggests they are more closely related to M. splendida. They are found in slow-moving streams out of the main channel, where they congregate near floating vegetation for cover.

The fish are omnivorous and should be fed quality flake food with supplemental proteins such as baby brine shrimp. They require clean water but tolerate a wide variety of water parameters. By providing frequent water changes, you will be rewarded with nearly continuous spawning attempts. Melanotaenia species deposit eggs in weedy areas (often mimicked by a yarn mop) and the eggs hatch 7-10 days later. Eggs can be harvested for hatching in separate tanks to avoid predation. Most Rainbows show their best colors at sunrise when the males display their bright fins for potential mates. Having more females than males will allow for proper color displays and avoid any unwanted aggression toward lone females.

Scientific Name: Melanotaenia splendida

Common Name: Black Fin Rainbowfish – Upper Katherine River

Max Size: 4.5″

pH: 6.5-8.0

Hardness: Moderate

Temperature: 70-80°

Aggressiveness: Peaceful

Region of Origin: Oceania

Captive Bred or Wild: Captive Bred