Sponge ID?

[LiquidCache]

The wife saw this at the lfs today and had to have it. I know it's a sponge but no idea what kind or its care level.

Any info would be appreciated.

 

[cloak]

Maybe these links will help. GL.

http://www.advancedaquarist.com/2011/6/inverts2

http://www.advancedaquarist.com/2004/4/inverts