Looks like I stand corrected, and I'll just have to take your word for it. I went the physics route(engineering), so I haven't had a Biology class since high school...
It makes sense, I am just one of those zoa nazis everyone is so fond of
. I have a friend with a tank full of zoas that all have long stalks and big oral discs (no, not bragging
). They could easily have been viewed as what used to be what I called Protopalythoa (including the one shown from the link from Fcwham and all people eater types). I guess they were just looking for more light, so they plumped up. It is interesting that something hat has a difference in DNA of only 0.001% can look so different, but look at the human animal and there are all kinds of differences...