Definition of rainbowfish in English:

rainbowfish

Line breaks: rain¦bow|fish

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.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day hubris
Pronunciation: ˈhjuːbrɪs
noun
excessive pride or self-confidence