rainbowfish or melanotaeniidae is live in a wide range of freshwater habitats, including rivers, lakes, and swamps

rainbowfish melanotaeniidae family small colourful freshwater fish northern eastern australia guinea including islands cenderawasih bay raja ampat indonesia sulawesi madagascar live wide range habitats rivers lakes swamps melanotaenia majority species demonstrate conspicuous sexual dimorphism males colorful sex showing elongated median fin ray generalized omnivores feeding crustaceans insect larvae algae pseudomugil genera regularly aquarium trade behaviour captivity tropical community eat floating flakes wild insects surface