Hannah, it's a wellsophyllia brain that I rescued out of my mom's tank. They're so picky. It was turning white/clear in her tank, while my brain (which is of the green, red, and purple variety and much bigger) was doing fantastically in her tank, but terrible in my big one. This one is turning pinker every day, which is cool to watch. In that photo, it was shriveled up and pissed at me for changing the water, which is why it looks odd. I'll post another later on of it open.
Sharkie, one of the LFS here has kept 2 catalinas at 74, in a reef tank, for the past 2 years, and they're active and doing well. So that's what I based by idea on... we'll see how it works out in the long term.