Polyclad flatworm?

[Chldshrbl]

So as I'm rearranging my. Rock today I found this little guy in my tank I think it's a polyclad flatworm. Just wondering if anyone has ever dealt with these any info would help like if there's one those that mean there's probably more?

http://i1223.photobucket.com/albums/dd511/chldshrbl/1324789293.jpg

 

[Chldshrbl]

As u can c I took it out and put it in a clear plastic cup until I Id it now it's looking like its not going back in

 

[BADGUS]

Looks like it,i have a few of those,well had not anymore.