The one in the background is a common red/green favia. See those allot, even at the lfs lately. Those and the more solid red favia are coming in allot.
The green acan, I'd try and ID first, before giving it some fancy name. Looks a little puffier than most echinata, might be a hillae or something else. Nice bright green for sure.
Hey those were more for fun, than anything for sure I would rather stick with just latin IMO but not as fun? I got no clue what they really are I guess, but I thought they were PURRTY?