fingerfish
/ˈfɪŋɡəfɪʃ/noun (plural same or fingerfishes)
A small silvery fish with a deep laterally compressed body, occurring in warm inshore and estuarine waters and popular in aquaria. Also called moonfish.
- Family Monodactylidae and genus Monodactylus: several species.
Origin
Late 18th century: from the genus name monodactylus, literally 'single finger'.