Anyone know what this is?

[JerseyReefer]

I just dipped a few corals that weren’t doing well after checking a bunch of other items. Some critters fell off. Any idea what this one is?

 

[ISpeakForTheSeas]

Looks like either an isopod or an amphipod of some kind- most likely harmless/beneficial.

 

[JerseyReefer]

Looks like either an isopod or an amphipod of some kind- most likely harmless/beneficial.

I think you're right!