Found this guy on Faya Lake crawling under water along a rock. It had a body that resembled a segmented stick (you can see the colour differences of the segments) with no visible fins or legs and out of one end, a round head with appendages that seemed to be propelling it. It looked like a tiny crab towing a worm.
Insect? Crustacean? Some kind of lamprey? Apologies for the picture quality but this is very zoomed in and the beast is under a foot of water.