lionfish

[ lahy-uh n-fish ]
/ ˈlaɪ ənˌfɪʃ /

noun, plural li·on·fish·es, (especially collectively) li·on·fish.

a brightly striped scorpionfish of the genus Pterois, especially P. volitans, of the Indo-Pacific region, having long, flamboyant, venomous spiny fins.
an Atlantic scorpionfish, Scorpaena grandicornis.

Origin of lionfish

1905–10 lion + fish

British Dictionary definitions for lionfish

lionfish
/ (ˈlaɪənˌfɪʃ) /

noun plural -fish or -fishes

any of various scorpion fishes of the tropical Pacific genus Pterois, having a striped body and elongated spiny fins