OK, what is this (with pic)

[djmpj2]

Is this a Sea Urchin? We've got 2:

 

[Serge]

Sure looks like it. Congrats!

8)

 

[Fluff]

Yep, sure is an urchin. Here is a link to mine, and what yours will grow into.

http://www.aquariumadvice.com/photopost/showphoto.php?photo=6656&cat=500&page=2

 

[XXFirefighter]

cool find, nice urchin...
Thinkin on getting one.. I already have 2 blue tuxes...

 

[djmpj2]

Fluff - how big is yours? How big do they get?

The larger of mine is about 1/2 inch. The smaller about 1/4 inch. Do they require any special care/feeding? Are they peaceful?

TIA
D