Definition of dealfish in US English:



  • A long, slender silvery fish with a dorsal fin running the length of the body, living in the northeastern Atlantic.

    Trachipterus arcticus, family Trachipteridae

    • ‘It was handed over to the marine aquarium at Macduff where staff reckoned it was either an oarfish or a dealfish.’
    • ‘Dealfish live in the Western Indian Ocean around South Africa and in the Eastern Indian Ocean from southern Australia to New Zealand.’
    • ‘The dealfish are deepwater fish that usually reside out of reach of the average fisherman and are therefore rarely encountered.’


Mid 19th century: from deal in the sense ‘board’ (with reference to its shape) + fish.