The origin of the dorsal fin is spaced a head-length back from gills in Speckled Worm Eels, whereas in Shrimp Eels dorsal fin origin is immediately behind gills. Speckled Worm Eels have a tail fin, while the Shrimp Eel tail ends in a fleshy tip with no caudal fin. Speckled worm-eels have a more pointed snout, while Shrimp eels snouts are more broadly shaped.