[Mr. Fishy Man]

Are either of these reef safe and how large do they get. I know that it says so on the website, but I did some reading and people say that these aren't reef safe, is this true?

http://www.reefs2go.com/product/INV_CR_SPONGE-BLACK/Live-Saltwater-Black-Sponge-Crab.html

http://www.reefs2go.com/product/INV_CR_SPONGE-ORANGE/Saltwater-Orange-Sponge-Crab-Oregonia-sp.html