Hmm, actually in reviewing the pic it looks slightly different than what my scutus ate, but it's hard to tell from that pic exactly. I'll dredge up a pic of what my scutus ate.
Here is a pic of the type of growth mine ate: (not my pic, from google images)
As far as a rebuttal to your nonsense? I didn't really see a point considering you haven't made one yet. You just did the same thing Rich tried to do in the thread about his "awesome story zomg." Throwing credentials into an argument, quoting dead languages to make yourself look smart, and misusing logic in nonsensical statements that misquote the other side of the discussion isn't really debate.
So far you've claimed:
GreshamH is capable of quoting a dead language, so this animal cannot possibly eat sponges. = False.
GreshamH can find a non scientific random quote on the internet claiming that scientists guess (sans research) this eats algae, so this animal cannot possibly eat sponges. = False.
Anathema doesn't know the difference between a sponge and a tunicate so this animal cannot possibly have been eating the unidentified matter it was observed eating. =False.
GreshamH knows a scientist, so he doesn't have to do any experiments or follow scientific method, his claims should be valid because his proximity to science makes him smart. =False.
I haven't blown anything, I just require more than bullying to convince me that something I observed is wrong. None of your "arguments" are proof, yet you are acting like they are. You are trying to build an argument out of your credentials and not much else, and when you find yourself in that position the best thing to do is concede that it's something you don't have the answers to. I find it funny that you think you do, but I remain unconvinced that the animal I watched eat the neon yellow growth from my live rock didn't actually do so.
I freely admit that I could be mistaken, but starting an internet shoving match with no real proof involved won't do anything to convince me of that. Feel free to have fun trying though.