Never seen anything like this, what is it?

[medinar83]

Woke up around midnight to get a drink of water, decided to flash my cell phone light on the tank and saw this thing cruising along the glass, probably about 3-4 inches, can someone tell me what it is? 

[Tired]

I've seen a picture of something like that before, let me find it.

 

Edit: here it is! Ribbon worms. https://chucksaddiction.thefishestate.net/hitchworms.html

[medinar83]

6 hours ago, Tired said:

I've seen a picture of something like that before, let me find it.

 

Edit: here it is! Ribbon worms. https://chucksaddiction.thefishestate.net/hitchworms.html

That's it! Thank you!