Madagascar rainbowfish

Bedotia madagascariensis

Wild range: Australasia (Australia)

At a glance: Madagascar rainbowfish care

Compiled reference information. Review the care notes and original sources below.

What temperature is listed for Madagascar rainbowfish?

The compiled profile lists 22.0–29.0 °C for Madagascar rainbowfish (Bedotia madagascariensis). Check the original sources below for context and differing recommendations.

What tank size is listed for Madagascar rainbowfish?

The profile lists a minimum tank volume of 31.7 US gallons (120.0 liters). Volume alone does not establish suitability; consider dimensions, group size and other inhabitants alongside the full care notes.

What pH is listed for Madagascar rainbowfish?

The compiled profile lists a pH of 5.0–8.0. Review the cited care sources alongside the other water parameters in this profile.

Natural habitat

Rainbowfish are found in various aquatic environments, such as streams and lakes, across Australia, Papua New Guinea, and Indonesia. They thrive in hard, alkaline waters typical of these regions, which supports both their health and vibrant coloration.

Where they are found

The species is primarily located in the lower reaches of the Ivoloina River and has also been introduced and established in the Betsiboka basin due to translocation efforts in the 1950s.

Aquarium care

In captivity, Madagascar Rainbowfish prefer a well-planted tank with plenty of swimming space. A moderate water flow and good filtration are essential. Regular water changes and maintenance will help keep the fish healthy. Provide hiding spots and possibly floating plants to create a comfortable environment that mimics their natural habitat.

Feeding

Rainbowfish enjoy a varied diet consisting of both plant-based and protein-rich foods. A diet of high-quality flakes, along with live or frozen foods like brine shrimp or daphnia, promotes their overall health and color vibrancy. Avoid overfeeding, offering only as much as they can consume in a couple of minutes.

Compatibility

Madagascar Rainbowfish are generally peaceful and can be housed with other species of similar size and temperament. Avoid keeping them with smaller fish, as they might be seen as prey. They do not coexist well with other Bedotia species due to the risk of hybridization; thus, adequate space and proper schooling are crucial for their social dynamics.

Breeding

Breeding can be achieved in a dedicated softwater breeding tank equipped with fine-leaved plants. Males display to attract females, and the eggs will be scattered over the plants. The eggs generally hatch in 7-10 days, with fry initially fed infusoria before progressing to larger foods.

Sources

Compiled from multiple independent care sheets — not copied from a single site.