Saccopharyngoidei

Saccopharyngoidei

[‚sak·ō‚far·əŋ′gȯid·ē‚ī]
(vertebrate zoology)
The gulpers, a suborder of actinopterygian fishes in the order Anguilliformes having degenerative adaptations, including loss of swim bladder, opercle, branchiostegal ray, caudal fin, scales, and ribs.