I just bought my first live-rock 2 days ago. Yesterday, it had this very small shrimp-looking guys crawling all over it. They are about 1/4 inch long and white. Are they actually shrimp? Plus there are other things that look like little hairs that come in and out of the holes in the rock. Is all this normal? I'm also following the the advice from the "advice section" in this website about using raw shrimp for the cycling instead of real fish. Shrimp is starting to decompose.