noun (plural same or rainbowfishes)
Any of a number of small brightly coloured fish of warm waters, in particular:
- ● an Australian freshwater fish (genus Melanotaenia, family Melanotaenidae). ● (Celebes rainbowfish) a freshwater fish native to Sulawesi and popular in aquaria (Telmatherina ladigesi, family Atherinidae).
More example sentences
- Visual cues alone allow for the expression of a preference for familiars in guppies and rainbowfish.
- Surface feeders such as rainbowfish will benefit greatly from feeding vinegar eels, but a lot of cichlid fry are bottom feeders.