what lives in the sand?
Couple nights ago i decided to check out my tank when it was all dark to see what goes on. I got my flashlight and started peeking around. Saw some stuff i don't see during the day, and one of them was some kind of anemone looking thing in the sand. There was about 10-12 arm-looking things sticking out of the sand, swaying in the current. Looked to be about 1/2" long or so with something on the tips of it, and it looked to be mostly clear in color. I was aiming the light on it while i was staring at it, and when the light was on it, it slowly started to retract in to the sand...sorta like a feather duster. After a little while it was totally gone, hiding in the sand. Every night since then i went to take a peek, and it's always in the exact same place, swaying in the current, and i don't have long to look at it cause when it sees the light it retracts in to the sand again. I wanna say the ends look like it has something fuzzy on the end? Anybody know what this is, or know where i can check for this kind of thing?