[Leafy]

I just found this purple worm/caterpillar in my fish tank. Also, one of my ghost shrimp was attempting to eat it when I found it. I have no idea where it could have come from... Can someone help me identify it? Also, it's around an inch long...

 

[Leafy]

Thanks, although I sort of doubt that it hitched a ride recently. This is because I haven't put anything new into my fish tank for the last couple of months. (I haven't been to the pet store since January.)

But maybe it is one of those hornworms... however, I don't see any horns.

 

[Leafy]

Well, here's another picture...

Oh yeah, it's not responding to my poking so it might be dead... Although it changed positions from last night so...

*Edit*

It's definitely alive because when I dunked it in the water, it started moving!