Tiny creatures

[Ice Man]

I am new to sw. Few days ago started cycling 30 g tank with 40lb of live sand and 40 lb of live rock. I cycle using pure ammonia. But not cycling is my question.
I purchased live rock, let's say, used. It is cover in a lot of purple coralline algae and even couple of polyps. Tonight I noticed few "bugs" hiding in a live rock. I am not sure if they are good or bad. They are about 1/8 of an inch, silver/grey, with couple antennas and few legs on each side. When I shine light on them, they immediately hide.
Guy I bought live rock from just had live rock and sand in a tank, few snail and crabs here and there, but no fish.
What are they? Like I said, it is my first adventure in to salt water world.

 

[Ingy]

Pods. Good to have. Clean up and feed other fishes too

 

[AquaRick]

Pics would help, but odds are they are amphipods. These guys are usually up late at night looking for food.

 

[Ice Man]

Pics would help, but odds are they are amphipods. These guys are usually up late at night looking for food.

Its gonna be hard to take picture, but I will try...

 

[AquaRick]

Check here:
Xtalreef - Reef Saltwater Aquarium

 

[Ice Man]

I have a lot to learn about sw. I googled it up and looks like pods.

 

[Ice Man]

Check here:
Xtalreef - Reef Saltwater Aquarium

Thanks!!!! This is a great resource!

 

[AquaRick]

No problem! It's a nice quick reference for many hitchhikers and other forms of life in our tanks.