Goyder River Rainbowfish

Goyder River Rainbowfish ( Melanotaenia trifasciata )

A locality form of Melanotaenia trifasciata from the Goyder River in the Northern Territory, Australia. It is known for its particularly vibrant “Banded Jewel” coloration.

• Maximum Size: Reaches approximately 10–12 cm (4–4.7 inches) total length.

• Appearance: Body with electric blue tones layered over a glowing yellow-to-orange base, often separated by a bold dark lateral band. Males display more intense coloration than females.

Aquarium Care

• Tank Size: Minimum 55 gallons (ideally 4 feet or longer) for a school.

• Water Parameters: 75–82°F (24–28°C), pH 6.5–8.0, soft to hard water. Adaptable to a wide range of stable parameters.

• Diet: Omnivorous. Accepts high-quality flakes, pellets, frozen foods, and live foods such as brine shrimp and daphnia.

• Behavior: Active schooling fish. Best kept in groups of 6 or more. May bully much smaller tank mates.

IUCN Status: Least Concern (species level).