macroalgae splitting apart

[bv_reefer]

i do have a sailfin tang that i saw try it once, spit it out, and never try it again, so i'm almost positive it's not him, and from what I've read they produce some noxious stuff so predator herbivores can't eat them. As for a pic, no i don't have a pic directly of him but i found a pic on the internet of one that looks identical to him, this is it skylord-

http://farm1.static.flickr.com/180/4...151aa1e824.jpg