Invertebrates for no/little rock, sandbed tanks.

[graveyardworm]

Chucks addiction has a great write up on seagrass beds as well as other zones. In the seagrass one he has a picture of one of the corals you describe that rolls and has living tissue all the way around. http://www.chucksaddiction.com/zone1.html

 

[kimmkimm]

It is good post and hope you all like it.