I found this PDF with good keys for eels in the Gulf.
http://texasseagrant...es_of_Texas.pdf
Using the keys this is what I came up with.
1b - Anus posterior to throat; body usually elongate but not ribbon-like; jaws elongate or short but occlusible distally.
2a - Posterior nostril located along edge of lip, usually covered by a small flap or in a short tube, and opening into or out of mouth.
--> Snake Eels (Ophichthidae)
1b - Caudal fin absent; tip of tail stiff.
2a - Pectoral fin present.
3b - Dorsal fin origin usually posterior to gill openings.
5b - Eye approximately centered above jaw.
6b - Dorsal fin origin posterior to tips of pectoral fins.
8a - Snout overhangs lower jaw; body without any distinctive pattern.
--> Shrimp Eel (Ophichthus gomesii)
Does it look like I got it right?