You might be able to one type of the clams, the lower light ones, i can't remember which they are i think the squamosas, but they get entirely to large for a tank like that. And you have plenty enough light to do quite a few things. I have sps under 130pc's in my 20 high....... But i put a disclamer on that i know what im doing..... If you've never kept corals before start with softies and lps its hard enough keeping the water params up there, alk and calcium, with a small tank. Both get used mighty quick in my tank....