Does anyone know what this is?

Hi there,

Lately, I bought like 40 or so pounds of live rock. I've noticed little "things" coming off of them and walking around the tank. They have legs, like water bugs.

They look like sperm, no joke. Less than 1cm long probably.

Could they be the Brittle stars reproducing? I have gotten rid of all of the Brittlestars, atleast I thought.

Please give me your opinion, and/or treatment.

 

Google copepods and amphipods

 

Copepods most likely

 

Should I be worried? Is this normal?

 

Harmless and good for your tank. Many fish and corals eat them.

 

Alright, just wanted to be sure because I bought a new anemone.

Thanks

 

first time ive heard that in this hobby. lol

 

heh help my tank seethes with sperm when the lights go out !

 

yeah this is a good thing, if you have a lot of them you can keep mandarins and such.

they eat detritus and algae and keep your rocks and sand bed healthy... as well as provide food for carnivorous fish