What is "pearlfish"

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.

n. Any of various slender marine fish of the family ''(taxlink Carapidae family noshow=1)'', resembling eels.

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]

Pearlfish are marine fish in the Carapidae family of ray-finned fishes. Pearlfishes inhabit the tropical waters of the Atlantic, Indian, and Pacific Oceans at depths to , along oceanic shelves and slopes. They are slender, elongated fish with no scales, translucent bodies, and dorsal fin rays which are shorter than their anal fin rays. Adults of most species live symbiotically inside various invertebrate hosts, and some live parasitically inside sea cucumbers. The larvae are free living.