Cairns Rainbowfish (Cairnsichthys rhombosomoides)

Fish in the family Melanotaeniidae. Moderate care. Freshwater.

Quick facts

Scientific nameCairnsichthys rhombosomoides

FamilyMelanotaeniidae

Also known asCairns Rainbow, Rhombosomoides Rainbow

Care levelModerate

Reef safetyFreshwater

TemperamentPeaceful (active)

DietOmnivore

Adult size3 in

Minimum tank size30 gallons

Water parametersTemp 70-79°F, pH 6.5-7.5, GH 5-14 dGH

Appearance

Slender silvery body with a faint dark lateral line and subtle yellow-orange fin tones; modest but attractive in an active group.

Difficulty and care for the Cairns Rainbowfish

Moderate

Origin and habitat

Australia (rainforest streams near Cairns, northeastern QLD)

Keeper notes

Peaceful schooler from cool, fast rainforest streams; prefers well-oxygenated, slightly cooler water and is uncommon in the trade. Males display harmlessly.

Log Cairns Rainbowfish in your reef tank

Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Cairns Rainbowfish alongside everything else in your reef.

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