Scuds?

[BelldandyShanny]

ok so on closer inspection, now that a larger one has emerged from the rocks to frolic  in view I do not have seed shrimp! They are scuds!  I thought they had too many legs to be seed shrimp.   This is an rcs tank so what can I safely put in there to perhaps munch on a few?  I have a couple cherry barbs I can move over if they are safe enough.

 

[Katzfish]

I'm new to a lot of this so, please, what is a seed shrimp and what is a scud?

 

[BelldandyShanny]

little hitchhiker critters, check the freshwater hitchhiker thread for pictures