资料来源 : Webster's Revised Unabridged Dictionary (1913)

Pearlfish \Pearl"fish`\, n. (Zo["o]l.)
   Any fish whose scales yield a pearl-like pigment used in
   manufacturing artificial pearls, as the bleak, and whitebait.

资料来源 : WordNet®

pearlfish
     n : found living within the alimentary canals of e.g. sea
         cucumbers or between the shells of pearl oysters in or
         near shallow seagrass beds [syn: {pearl-fish}]