If you like the look of the sun corals but hate that they're always closed (thats the downside to them) there is an alternative which is called a dendro... They're a bit more pricey but they're open all day and all night and they're just stunning. One thing though, like the sun corals, they do need to be fed multiple times weekly to survive as they are not photosynthetic. If your interested in a frag pm me.