Worm-like hitchhiker ID

[Fishy Guy]

I recently found some zoa-eating nudis in my tank. I re-dipped all of my zoas today in Melafix and had a few more nudis and two small worm-like creatures. Was hoping someone would be able to ID.

 

[ISpeakForTheSeas]

Was hoping someone would be able to ID.

I can't quite see them clearly enough to give a proper ID, but looking at the video it seems to have legs when it rolls over, so it's some kind of "pod."

A few of them can look like this, but I'd need clearer pics of the tail from the top and the front limbs of the critter from the side to say which.

Regardless, about the worst I'm aware of eat small pods and worms, so they're not really bad critters to have.