Marine roly-poly?

[emilybear91]

I've noticed that I have a good many of these in my sand. They appear to be segmented with a hard shell, and can move fairly quickly on legs too small to see. They all have varying black and white patterns. Every now and then I see one on coral but they don't appear to be eating or irritating. Curl into a ball when you pick them up... Anyone have an ID?

 

[Greg]

Chiton.
Snail, doesn't have legs.
Most are considered good guys.

 

[ryanjan11]

I think they are called chitons

 

[trackfast]

Great algae eaters.

 

[johnike]

Great addition to the tank, I have many in the 240.
Here's the skinny on 'em.
http://www.reefcleaners.org/index.php?page=shop.product_details&flypage=flypage-ask.tpl&product_id=6&option=com_virtuemart&Itemid=34