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).
- 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.
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