Definition of jewelfish in US English:

jewelfish

noun

  • A scarlet and green tropical freshwater cichlid.

    Hemichromis bimaculatus, family Cichlidae

    • ‘Examples include the oscar, Jack Dempsey, jewelfish, convict cichlid, Midas cichlid, and spotted tilapia.’
    • ‘Several cichlid genera are popular aquarium fishes - Cichlasoma, Pterophyllum, Symphysodon, and jewelfishes - because of their mild temperament and ease of breeding in captivity.’

Pronunciation

jewelfish

/ˈjo͞oəlˌfiSH/