Is this Majano, man?

[wstubbs]

I am on the verge of breaking in to a reef setup but as of right now I'm rolling with a FOWLR system. About a month ago I purchased various types of rock from a LFS. Recently I started noticing a few extras on the rock. Can you help out the ignorant? Thanks in advance!

Not sure??? I can get a better pic if you need.

Majano? It is green with maroon tips.

Sponge? (It was originally in a shadier area)

Sponge view 2?

 

[Anonymous]

Looks like a majano to me in first couple of pics.

Second likely a sponge or possibly colonial tunicate but sponge more likely.

 

[Anonymous]

1st pic is zooanthids
2nd pic looks like majano
3rd & 4th is either tunicates or sponges

 

[c-town]

the frist pic is button polyps and the thrid and fourth are sponges

 

[wstubbs]

Thanks guys. I'll keep my fingers crossed. Hopefully my tank conditions are right for 1 & 3.

If #2 is majano, does it reproduce rapidly? Is it just hard to kill? Will it cause any damage? Why is it considered a nuisance?