Little crawling bugs

[MaJuBo]

I have a new live rock with some crawling things, any idea what these are? I also have some cyano, I think.

 

[gentlefish]

Those are amphipods. Good to have and good extra food for fish. The red stuff, if you can blow it off with a Turku vaster it’s cyanobacter, but it looks much more like coralline algae. Good.