Mer Made
The tail that lead off from behind these where the torso tapered off looked like a giant eel's tail- with a narrow translucent fin that followed around most of its entire length.
FXM Legions of TEMPEST: First Encounter: Cthylla's Emergence
Of the room were one individual who was retrieving something from the depths of his locker, the door obscuring mostly all of his (orion guessed it was a 'he' from the quietly cursing voice he heard from inside) features save for the long slender green eel tail