Definition of pearlfish in English:
noun (plural same or 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
- 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).
- Cardinalfishes and pearlfishes live inside large gastropods and mollusks.