ID Me Quick Please!!!

Tomorrow after our light comes in I will try to get some better pictures, as right now we just have the light that came with the tank. The new one is the 2x65watt one by current-usa. For 3$ a lb for the rock, I think I made out good...minus the worm war.
 
Okay one last question, do these guys just multiply on their own? I've counted 8 so far, considering I can only see 2 of the back 2. There are 2 tiny ones next to the one in the middle of the picture and like 4 with the other. Hope no one bothers them too.
 
Any idea what kind they might be? I'm so curious now. They are really catching my eye now.
 
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