Gasterosteiformes

(redirected from Gasterosteoidei)

Gasterosteiformes

[‚gas·tə‚rä·stē·ə′fȯr‚mēz]
(vertebrate zoology)
An order of actinopterygian fishes characterized by a ductless swim bladder, a pelvic fin that is abdominal to subthoracic in position, and an elongate snout.