Chiton or worm?/keep or toss

[NeMoo]

I know it’s small, but this is the best picture I can get?

 

[tbrown]

Either a Chiton or an Isopod.

 

[NeMoo]

Either a Chiton or an Isopod.

So throw him back in? Thanks tbrown, always there for the ID!

 

[JoJosReef]

Look underneath it. Is the bottom like a snail (i.e., a sticky foot)? Or does it have segmented leg/appendages? If the latter, then isopod (maybe good, maybe bad). Former: chiton == good. Isopods to watch out for are cirolanid isopods. You would clearly be able to distinguish black eyes on them, though. I can't really see eyes here, so my guess is chiton. Also, was it slow or moving fast? Isopods are fast movers/swimmers.

 

[NeMoo]

Idk I think tbrown was right, didn’t look snaily but I tossed it, I think I have enough cleanup without risking it