Rainbow Maccullochi - 5cm

Species Profile

• Scientific Name: Melanotaenia maccullochi
• Common Name: Rainbow Maccullochi
• Adult Size: 3 to 4 inches (7.5 to 10 cm)
• Life Expectancy: Around 5 to 8 years in captivity
• Habitat: Native to freshwater rivers and streams in northern Queensland, Australia; typically found in clear, slow to moderately flowing waters with abundant vegetation

Tank Requirements

• Minimum Tank Size: 30 gallons (114 liters)
• Ideal Temperature: 72–82°F (22–28°C)
• pH Range: 6.5–7.8
• Water Hardness: Soft to moderately hard (5–15 dGH)
• Temperament: Peaceful, schooling fish; best kept in groups of 6 or more

Diet & Nutrition

• Omnivorous: Yes — feeds on a variety of foods including high-quality flake or pellet food, frozen or live brine shrimp, daphnia, and plant matter.

Appearance

• Deep, laterally compressed body with vibrant, metallic rainbow coloration
• Males are usually more colorful with brighter and more pronounced markings than females
• Stripes of orange, red, blue, and green shimmer along the body

Distinctive Features

• Striking iridescent scales that reflect light beautifully
• Rounded fins with bright hues matching body colors
• Active swimmers that add vibrant movement and color to community tanks