New critters please help ID!

[sEaLiFe4LiFe]

What's up RC I've been cycling a 150g for about 10 days now. I came home today and turned on the lights and saw these critters on the live rock. Should I be worried??

 

[Calappidae]

Amphipods, Those are good guys and I never heard of a system without one.

 

[Sugar Magnolia]

Yes, highly beneficial.

 

[BlueGeckoHI]

Those are a good sign!