Copepods, Amphipods?

[Tetra1]

I just noticed that I have tiny white itty bitty guys crawling all over my glass. My crabs have been picking them off and eating them could these be the guys mentioned in the title. They just all showed up today. Let me know, thanks. If they are how do I know which ones they are?

 

[BL1]

Sounds like amphipods, check out this link, Deep Sand Beds
About 3/4 down the page there are pics of both

 

[Tetra1]

I think they are amphipods because I have seen some larger ones in the tank. Maybe they all just hatched recently. I hadn't seen any for a month, until just today.

 

[Cottonwood]

Hey I saw one of these guys in my tank the other day...just one, but I had no idea what it was. Thanks for the posts!

 

[BL1]

I've read that they can go in cycles. You'll see them for a while, then all of a sudden you won't see any for months and then they'll pop up all over the place again.