| Saccopharyngiforms | ||||||||
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| Scientific classification | ||||||||
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| Families | ||||||||
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Cyematidae Saccopharyngidae Eupharyngidae Monognathidae |
Saccopharyngiformes is an order (biology) of unusual ray-finned fish superficially similar to eels, but with many internal differences. Most of the fish in this order are deep-sea types known from only a handful of specimens.
Saccopharyngiforms lack several bones, such as the symplectic bone, the bones of the opercle, and ribs. They also have no scaless, pelvic fins, or swim bladder. The jaws are quite large, and several types are notable for being able to consume fish larger than themselves.