Zoo's Growing on my Decorator Crab?

[vinsaltank]

I noticed small brown lumps on my decocrab the other day.
I caught him wandering around when I had my actinics on.
He appears to have several 2-3 polyp ZOO's growing on him.
Could this be possible?
Check out the pics.

 

[vinsaltank]

another shot

 

[promisetbg]

My Tuxedo urchin and my hitchiker decorator crab do the same thing!Neat huh?
The decorator just recently molted..he lives in my refugium,his current attire is some caulerpa..it goes all the way up his head Yours appears to be the spider shaped type,mine is the triangular shaped kind..he is red,with red and white striped legs...and he is HUGE

 

[rubberduck]

THATS COOL

 

[mbowker]

they didnt grow there, he put them there, hopefully he doesnt nip more than they grow. be careful with him