Definition of pearlfish in English:


nounPlural pearlfishes

  • 1A long slender fish found chiefly in warmer seas, which lives inside the shells of bivalve molluscs or the body cavities of sea cucumbers and other invertebrates.

    Family Carapidae: several genera and species

    • ‘Cardinalfishes and pearlfishes live inside large gastropods and mollusks.’
    • ‘One creature that takes advantage of the movement of water to the respiratory trees in the sea cucumber is the pearlfish, or cucumber fish (Carapidae).’
  • 2A small Argentinian killifish, popular in aquaria.

    Cynolebius belotti, family Cyprinodontidae