This would prove to be the case; 30 million books and counting have sold worldwide in more than 50 languages. Colors on the back of the fish can range from brown to olive to dark blue. Coloration of the fish varies widely in relationship to sex, habitat, and maturity. Rainbow trout are a North American game fish that get their name from the beautiful colors that shine on their skin. Melanotaenia is considered as the largest rainbowfish genus. Rainbow fish agression help. It … The Rainbow Fish was the very first children’s picture book to use hot foil stamping to create such a sparkling foiled effect. They are spreading around Raja Ampat Islands in Indonesia, islands in Cenderawasih Bay, New Guinea, eastern Australia and northern Australia. Rainbowfish are a family of beautifully colored freshwater fish. They are a classic reason why English names for fish ("rainbows") can be useless - you could not keep them together unless you were feeding the threadfins to the larger, very different fish. The name Rainbowfish is derived from the amazing iridescent colorations that change when light reflects off of these fish. Smaller species like the Neon Dwarf Rainbow (Melanotaenia. praecox) and the Celebese Rainbow (M. ladegesi), will thrive in a 30-gallon aquarium, whereas most other Melanotaeniid rainbowfish need … A schooling fish, Rainbowfish prefer to be in groups of six or more fish of the same species. But in these times of democratic socialism and ideological abstractions untethered to real-world habits, The Rainbow Fish may have more resonance than ever. After going on sale, it was soon clear that the first printing of 30,000 copies would not be enough. Rainbowfish can be found in fish tanks and aquariums around the world, but they also live in the wild. They're native to tropical, warm places, including Australia, New Guinea, and Madagascar. In numbers like that, there is no real aggression, but a lot of threatening behavior and showing off. They are most easily told apart by differences in color pattern, particularly in the unpaired fins, and some morphometric counts. You may not have known that there are over 50 species of rainbow fish around the world, and more than a handful can be found for your own aquarium right here in the U.S. Below, learn more about eight different species of rainbow fish, specific characteristics of each, and their requirements as pets. The small fish is included in the family Melanotaeniidae. These hardy, active fish do well with a variety of community fish. Melanotaeniids are active fish and need plenty of swimming space. The Rainbow Fish is a children's picture book drawn and written by author and illustrator, Marcus Pfister, and translated into English by J. Alison James.The book is best known for its message about selfishness and sharing and for the distinctive shiny foil scales of the Rainbow Fish. Rainbow Fish Fact 6: Rainbow fish are a schooling fish and a minimum of six should be kept together in your tropical aquarium: Rainbow Fish Fact 7: The plural of the word fish is fishes, however when describing more than one fish of the same species, the word fish is still used instead of the plural! The name of the genus is taken from the words, melano and taenia. The Madagascar Rainbow Fish (Bedotia madagascarensis) is often confused with and misidentified as Bedotia geayi, which is a valid congener native to the Mananjary River system, immediately south of its natural range..