That what i've read, but then I read that is overstated too. I have about 1 1/2 to 2 inches of sand and could add more for any sand dweller, definate if a tube anemone went in. Looked at the goblin again last night, it is a walking popeye sea goblin. Looks different then the one on live aquaria. They are currently feeding it ghost shrimp so it is on live food, and they say it hasn't tried to hurry itself yet.
What are potential tank mates? Currently there are one skunk clown, yellowtail blenny, and a kole tang in there. I believe I need to pull the clown and blenny out. Would a dwarf lion work in there wit the tang and goblin?