What is this?

[peregrinus]

its a brittle star. :D its a good thing to have.

[Reef_Angel]

Aw Tracy, he's a cute little bugger! Don't forget to shoot a few brine shrimp down in his new home. They don't come out that much, but I got a kick out of feeding him. He got pretty used to being spoiled. Eventually he met me right at the doorway to his cave, and would take out some shrimp right out of the baster while I squirted in his portion. They are a lot more than a leggy little critter that just eats though. I find them quite interesting. As mine got bigger, his central disk got so wide, and I assume while he was digesting, he'd turn on his spin cycle. He'd move around a small pea sized object in circles around his belly. If I'm wrong about the movement in it's belly, I'd be curious to know any thing else happens to know! Thanks for sharing your new friend Tracy!