Madagascan Rainbow Fish

Madagascan Rainbow Fish (Bedotia geayi)

Let’s step into the vibrant world of freshwater aquariums, where the Madagascan Rainbow Fish, also known as Bedotia geayi, brings a burst of color and life. In this article, we’ll dive deep into the fascinating realm of these captivating fish, exploring their personality and the secrets of their natural habitat. Let’s uncover the wonders of the Madagascan Rainbow Fish and learn how to create a thriving aquatic haven right in your own home.

Size and appearance

The Madagascan Rainbow Fish boasts a slender and elongated body, reaching lengths of up to 7-9 centimeters (2.75-3.5 inches) when fully grown. Its vibrant coloration is a sight to behold, with iridescent hues ranging from shimmering blues and greens to fiery oranges and yellows. Adorned with distinct lateral stripes and a forked tail fin, this species adds a splash of color and elegance to any freshwater aquarium.


Endemic to the island of Madagascar off the southeastern coast of Africa, the Madagascan Rainbow Fish inhabits the clear, fast-flowing streams and rivers that crisscross the island’s lush landscapes. It thrives in freshwater habitats rich in vegetation, rocks, and submerged roots, where it can find ample shelter and foraging opportunities.


Known for its peaceful disposition and sociable nature, the Madagascan Rainbow Fish is a delightful addition to community aquariums. It thrives in groups, displaying shoaling behavior as it explores its environment and interacts with tank mates. Despite its small size, this species exhibits a curious and active demeanor, constantly darting around the aquarium in search of food and companionship.


As an omnivorous species, the Madagascan Rainbow Fish enjoys a diverse diet that includes both plant and animal matter. In its natural habitat, it feeds on algae, small invertebrates, and aquatic insects. In captivity, it readily accepts high-quality flake foods, pellets, and frozen or live foods such as bloodworms, brine shrimp, and daphnia. Supplementing its diet with fresh vegetables like blanched spinach or zucchini enhances its overall nutritional intake.

How to keep the Madagascan Rainbow Fish at home

To ensure the health and well-being of Madagascan Rainbow Fish in your home aquarium, consider the following care guidelines:

Tank size: Provide a spacious aquarium with a minimum capacity of 75 liters (20 gallons) to accommodate a small group of Madagascan Rainbow Fish. Decorate the tank with plenty of plants, rocks, and driftwood to mimic their natural habitat and create hiding spots.
Water parameters: Maintain stable water conditions with a temperature range of 22-26°C (72-79°F) and a slightly acidic to neutral pH level between 6.5 and 7.5. A moderate water hardness of 5-12 dGH is ideal for this species.
Tank mates: Madagascan Rainbow Fish are peaceful and sociable, making them compatible with a wide range of community fish species. Suitable tank mates include other peaceful tropical fish such as tetras, rasboras, and small barbs. Avoid housing them with aggressive or territorial species that may intimidate or harass them.
Compatibility: Offer a varied diet consisting of high-quality flake foods, pellets, and frozen or live foods to ensure optimal nutrition and health. Feed small amounts multiple times a day to accommodate their energetic feeding behavior.

In conclusion, the Madagascan Rainbow Fish, with its dazzling colors and amiable temperament, is a delightful choice for freshwater aquarium enthusiasts seeking to add vibrancy and vitality to their aquatic displays. By providing a suitable environment and meeting their specific care requirements, you can enjoy the beauty and charm of these captivating fish in your own home aquarium for years to come.

Scientific nameBedotia geayi
Type of aquariumFreshwater
Size7-9 cm (2.75-3.5 inches)
Ideal tank size75 liters (20 gallons) or larger
Ideal water temperature22-26 °C (72-79 °F)
DietOmnivorous; flake foods, pellets, live/frozen foods
ReproductionEggs laid on substrate, no parental care
Life span3-5 years
SchoolingSociable, prefers groups


Share on Facebook
Share on Twitter
Share on Linkedin

Leave a Reply

Your email address will not be published. Required fields are marked *