ID please

[Bonsai reef]

Please help ID this. Only seen at night after lights are out and very fast scrolling all over the rock and sandbed. There are 100s of them. Are they good or bad for the reef tank?

Not sure if video link works so putting a pic as well

 

[mta_morrow]

Pods. +1!

 

[WV Reefer]

Please help ID this. Only seen at night after lights are out and very fast scrolling all over the rock and sandbed. There are 100s of them. Are they good or bad for the reef tank?

Not sure if video link works so putting a pic as well

amphipod. Good guys.

 

[vetteguy53081]

filet Mignon for fish and coral

 

[Bonsai reef]

Awesome. Thank you guys!