Rainbow Redtail Snakehead - 5cm

Species Profile

• Scientific Name: Channa gachua
• Common Name: Rainbow Redtail Snakehead, Dwarf Snakehead
• Adult Size: 15–20 cm (6–8 inches), though some regional variants can reach up to 25 cm (10 inches)
• Life Expectancy: 8–10 years (sometimes longer in ideal conditions)
• Habitat: Slow-moving or stagnant freshwater bodies like ponds, ditches, and rice paddies in South and Southeast Asia (India, Sri Lanka, Myanmar, Thailand, Malaysia, etc.)

Tank Requirements

• Minimum Tank Size: 30 gallons for a single adult; larger (50–75+ gallons) if keeping a pair or group
• Ideal Temperature: 22–28°C (72–82°F)
• pH Range: 6.0–7.5
• Water Hardness: Soft to moderately hard (5–15 dGH)

• Temperament:

  • Generally semi-aggressive to territorial, especially when breeding
  • Can be kept in pairs or small groups if introduced early and given space
  • Not suitable for small or timid community fish

Diet & Nutrition

• Omnivorous: Yes
  • Prefers meaty foods: live/frozen shrimp, fish, worms, insects
  • Will also accept high-protein pellets and some plant-based foods
  • Opportunistic feeder with a strong predatory instinct

Appearance

• Coloration: Varies by location — commonly shows blue iridescence, red/orange tail highlights, and dark mottling on the body
• Body Shape: Long, elongated body typical of snakeheads with a large mouth and sharp teeth

  Sexual Dimorphism:

  • Males often have more intense coloration and longer fins
  • Females tend to be rounder-bodied, especially when gravid

Distinctive Features

• Labyrinth organ: Allows it to breathe atmospheric oxygen — can survive in low-oxygen environments
• Parental care: Mouthbrooding species — males typically carry the eggs and fry in their mouths
• Colorful variant: "Rainbow" name refers to the beautiful iridescent coloring in some populations
• Highly adaptable: Can thrive in a wide range of water conditions but needs a secure tank lid (excellent jumpers)