Madagascar Rainbowfish (Bedotia geayi)

The Madagascar Rainbowfish is a vibrant, schooling species native to the clear, fast-flowing rivers of Madagascar. They are easily recognized by their elongated bodies and two distinct dorsal fins. Their coloration is a sophisticated mix of pale gold and silver, highlighted by a bold black mid-lateral stripe and striking red-orange tips on their fins. Because they are constantly in motion, they provide a sense of life and energy to the upper and middle layers of the aquarium.

Key Information

• Common Name: Madagascar Rainbowfish

• Scientific Name: Bedotia geayi

• Origin: Madagascar (East Coast rivers)

• Max Size: 10–15 cm

• Lifespan: 5–8 years

• Temperament: Peaceful and active

• Diet: Omnivore – Readily accepts high-quality flakes, floating pellets, and frozen foods like bloodworms or brine shrimp.

• Care Level: Moderate (Sensitive to water quality changes)

Water Parameters

Parameter	Value
Temperature:	22–26°C (Prefers slightly cooler than Discus)
pH:	6.5–7.5
Hardness:	8–15 dGH
Minimum Tank Size:	150L+ (Needs length for swimming)

Behaviour & Tank Compatibility

Madagascar Rainbowfish are social animals and must be kept in a group of at least 6–8. Keeping them in a school not only reduces stress but also encourages the males to display their best colors while competing for female attention. They are peaceful community fish and pair well with other active species like larger Danios, Barbs, and other Rainbowfish. Avoid keeping them with very slow-moving or shy fish that might be intimidated by their fast swimming.

Ideal Tank Setup

• Ample Swimming Room: They are extremely active. Use a "Long" tank format rather than a "Tall" one to give them the horizontal space they need to dash.

• Strong Filtration: They come from flowing river environments and appreciate well-oxygenated water with a moderate current.

• Planted Borders: Decorate with dense plants along the back and sides, but keep the center of the tank open for swimming.

• Secure Lid: Essential. Like most streamlined, surface-dwelling fish, they are excellent jumpers when startled or excited during feeding.

• Water Stability: They are more sensitive to high nitrates than many other Rainbowfish. Regular water changes are key to maintaining their vibrant red fin tips.