Members of a less common genus of rainbows endemic to the island of Madagascar off the east coast of Africa, the appeal of the Madagascar Rainbowfish is easy to see. Shimmering silver bodies, deep red fins, and thick black markings mean this bold fish will stand out in any aquarium. A larger rainbow fish it reaches about 6 inches, making them a great fish for the large tank fish keeper. They add visual interest and are able to adapt to a variety of conditions. Aquarists often find that the Madagascar Rainbowfish is more civilized than the other rainbow fish, making it suitable for pairing with a wider array of tank mates. They are a schooling fish and need to be kept in groups of at least 6 to be comfortable. But they are generally peaceful with each other and friendly with other species of similar size and temperament.