another newbie question

[jws444]

Have a look at an encrusting sponge - Monanchora barbadensis

http://www.wetwebmedia.com/spongesiii.htm

4th pic from the bottom.

I guess we'll have to look really close at the red formations on our rocks. I see the sponges definately having an 'organised' system of canals. I definately don't recall seeing mini siphons on mine.