M. s. Splendida Wallaby Creek Rainbow - (No Online Purchases)

TheM. s. Splendida "Wallaby Creek" Rainbowfish—fully known asMelanotaenia splendida splendida—is a highly prized, localized geographic variant of theEastern Rainbowfish (or Splendid Rainbowfish).

Because rainbowfish color variations are tied strictly to the specific Australian creek or river system they originate from, the "Wallaby Creek" locality is distinct. It is celebrated by native fish enthusiasts for its stunning, iridescent color shifts and robust, hardy nature.

Appearance & Size

• Coloration: Males display a gorgeous palette of pale bluish-green, olive, and golden-yellow iridescent bodies. Horizontal scale rows are separated by narrow, fiery orange-to-reddish stripes. Their dorsal, anal, and caudal fins feature bright, checkerboard-like patterns of red, orange, and yellow. A distinct yellow or orange spot is typically visible on the gill cover (operculum).

• Sexual Dimorphism: Males are significantly more colorful, have much deeper bodies, and possess longer, more pointed dorsal and anal fins. Females and juveniles remain a more subdued, silvery-clear color.

• Adult Size: They generally reach a maximum size of8 to 10 cm (approx. 3.5 to 4 inches).

Natural Habitat

This specific variant is endemic toWallaby Creek, a pristine freshwater system located within the Annan River catchment near Cooktown in tropical North Queensland. In the wild, they thrive in schools near the surface of slow-moving streams, clear pools, and lagoons, often seeking cover under overhanging vegetation and submerged logs.

Aquarium Care (Easy to Moderate)

Thanks to the variable coastal climates of Queensland, Eastern Rainbowfish are incredibly resilient and make excellent, forgiving choices for fishkeepers.

Tank Size & Parameters

• Minimum Tank Size: A minimum of100 liters (approx. 25–30 gallons) is required, but a 3-foot or 4-foot tank is highly recommended. They are active, fast-paced swimmers that need long horizontal stretches of open water.

• Water Parameters:

  • Temperature: 24–30°C (75–86°F)

  • pH: 6.5–8.0 (they prefer neutral to slightly alkaline water, around7.0–7.5)

  • Hardness: Soft to moderately hard water.

Diet & Feeding

They are enthusiasticomnivores with a high metabolism.

• Provide a high-quality tropical flake or micro-pellet as their baseline food.

• Supplement regularly with live or frozen treats like brine shrimp, daphnia, bloodworms, and blackworms to trigger their best breeding colors.

• Including a little plant-based matter (like spirulina flakes) keeps their digestive tracts healthy.

Behavior & Tank Mates

• Strict Shoalers: You must keep them in a group of at least 6 to 8 individuals. Keeping a ratio of 2 or 3 females per male is ideal; it gives the males a reason to "flash" their brilliant courtship colors without single females being chased relentlessly.

• Temperament: Wonderfully peaceful. They make excellent additions to medium-to-large community aquariums.

• Compatible Mates: Other peaceful rainbowfish varieties, peaceful medium-sized tetras, Corydoras catfish, plecos, and gouramis. Avoid housing them with tiny dwarf shrimp, as the rainbowfish will view shrimplets as a snack.

Tank Setup

• • Aquascaping: Plant the sides and background heavily with hardy species (like Vallisneria or Java Fern) to mimic their riverbanks, but leave a wide-open channel in the middle for schooling sprints.

  • The Lid Factor:A tight-fitting lid is non-negotiable. Rainbowfish are notorious surface-feeders and excel at launching themselves straight out of unsealed tanks when startled or displaying.