Mysis

[Starry]

My 33g tank has been running 4 months now (fishless) with only corals in it. Over the last few weeks I have been noticing alot more life in the tank. The other night I saw little orange eyes moving around on the rock, and yesterday in the light I saw that they were mysis shrimp. No idea how they got in there. There are at least 2 of them (saw them side by side).

Will they breed and populate my tank? Hopefully making an additional food source for my future fishies!

Would my skimmer skim out any larvae?