Worms in my tank!! Help
Okay so I turned on my filter earlier today and I noticed a few worm looking things just start to wiggle and thrash about. I have no idea what they are, I've had this tank for over a year and never seen anything like that in it before.. Nothing attached to my fish, no sores or ulcers or anything like that. They're easily visible.
I've been searching the Internet for about an hour and have gotten nowhere.
THEY ARE NOT PLANARIA. I don't think they are detritus either.
This is the best picture I can get right now.. Looks to have maybe a fork/split on one end..
Does not move like a snake slithering, just like random thrashing. Please if anyone knows what it is, if it is harmful, and how to get rid of it.