ID these new critters?

These little guys have showed up in the tank about a week ago. They are hanging out under a piece of rock near the glass. Just so happens this area is not easy for any of the fish to access. They seem to be darting around like baby fish?
We do have a pair of clownfish that have been acting like they might be nesting inside a log (one of those ceramic things) but that is on the other side of the tank.
Anyone know what these are?
Clownfish fry?:

Wondering if we should be doing anything about and/or for them?

 

I'd say they're most likely isopods, but possibly shrimp fry. Clown fry are typically colored; also, the parents would be protecting them and keeping them near the nest.

 

Cool!!

 

Yea they look like shrimp fry to me.

 

Very helpful, thank you.