What are these?

[Redox600]

Found a bunch of these little guys on my glass on morning...
http://i234.photobucket.com/albums/ee93/redox600/Salt%20Water/P1010002.jpg
http://i234.photobucket.com/albums/ee93/redox600/Salt%20Water/P1010006.jpg

Anyone know what they are?
Thanks!

[mikemikemike]

Looks like some kind of flatworm.

[Redox600]

Thanks!

[reefgeek110]

good luck once these guys take hold you're gonna have a heck of a time getting rid of them. Had them once numbering in the 10000s!