+1 The brownish ones are button polyps. IMO, zoas are zoas. People give them fancy names, but half of them that were given names are called other things by whoever has them. There are no definites. There is also some xenia in the bottom right of the last picture. It could also be anthelia, which are similar, but not exactly the same. Anthelia have one star grown off of one stalk, while Xenia have a thick stalk with a lot of stars growing off of them.