Definition of rainbowfish in English:


nounPlural rainbowfishes

  • Any of a number of small brightly coloured fish of warm waters.

    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.’