|Family||Scientific Name||Author||Year||Common Name|
|Synaphobranchidae||Synaphobranchus kaupi||Johnson||1862||Northern Cutthroat Eel|
Family Synaphobranchidae — Teeth usually small and conical, in 1 to several rows on jaws and vomer; some species have enlarged, compound teeth on vomer, but large fangs never present. Gill openings low on body, below pectoral fins (when present); sometimes the gill openings of the 2 sides united in a ventral slit. Dorsal and anal fins well developed, confluent with caudal fin. Pectoral fins present or absent. Scales present or absent.
Unique Characters: Gill openings on the 2 sides united as a longitudinal slit on ventral midline. Scales present. Scales very elongate (3-4 times as long as wide), small, regularly arranged in aligned clusters of 4 or 5 set at right angles to other such groups. Dorsal-fin origin well behind level of anus. Vomerine teeth uniserial but zig-zag anteriorly.
Grey Cutthroat Synaphobranchus affinis
Grey Cutthroat Synaphobranchus affinis. Gill openings on the 2 sides united as a longitudinal slit on ventral midline. Scales present. Scales oval, not so regularly arranged. Dorsal-fin origin at or just posterior to level of anus. Vomerine teeth uniserial.
Shortbelly Eel Dysomma anguillare. Gill openings separate, although they may be closely approximated. Scales absent.