Not sure about the 2 MM's. This second one looks like it's thinner, although it retracts when I get near or touch it too. Hard to tell because it's in really bright light. Guess I'll just have to wait.
The corals along the front are Pocillipora's.
I have them in a very high flow area. I took my medium size Pocillipora out to snip a dead branch off one day and didn't realize how fragile it was! Well, now I have 3 frags of it... The good news is that it's growing like crazy there.
Hey Catran! You have a truly beautiful tank. Love the way the corals are spread out, and my personal opinion is that you have succeded (to my taste anyway!) with the rockwork composition making some areas a bit more shady from the lighting. I think this makes tanks more spectacular in a dynamic way, and colours meets the eye with a broader spectrum. Cool tank!
Cat the tank looks awesome! I agree with Terry on the HH being MM. If they're sticky you know they're not ordinary mushrooms. Very cool bonus if they are, I love my 2 they're so cool.