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.
珍珠鱼，潜鱼
Family Carapidae: several genera and species
Example sentencesExamples
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.