Good or bad isopod? Definitely not the usual copepod or amphipod that I see.

[yanetterer]

I can usually identify a typical pod, but this one is new to me. It isn’t going to make it into my tank either way, just curious if it is a good guy or a bad guy.

He’s a jumper. Leapt from the outside of the bag onto my hand and then into the bucket of frags.

 

[EricR]

I have no idea but have seen other people focus on the eyes to differentiate some species of isopods.

Here's one example and the original post in this thread may be similar to what you're seeing:

Isopods

 

[yanetterer]

Thanks for the link. I tried to get some more pictures and I can’t even see any eyes lol.

 

[BZOFIQ]

Looks like a sand flea? maybe not!

 

[SaltyT]

Looks like a sphaeromatid isopod... did it roll up in a ball when you caught it?

 

[yanetterer]

Looks like a sphaeromatid isopod... did it roll up in a ball when you caught it?

Not completely like the ones I'd find under a log, but it did curl up maybe half way.

 

[JoJosReef]

Not completely like the ones I'd find under a log, but it did curl up maybe half way.

Likely spheromatid or closely related. Cirolanids don't curl at all, from what I've read. I'd still hesitate to throw back in without a positive ID. Have you seen more in the tank?

 

[yanetterer]

Likely spheromatid or closely related. Cirolanids don't curl at all, from what I've read. I'd still hesitate to throw back in without a positive ID. Have you seen more in the tank?

It came in on a frag, so fortunately no others in the tank. I didn't see any others when I inspected and did a dip.

 

[JoJosReef]

I'd leave it out of your tank. Most likely not a baddie, but can't be sure without a positive ID.