frogspawns are cool, they are listed as corals, but are alot like anemones. pretty easy to keep from what i've read in Aquarium magazine. and mushroom corals are actually anemones according to this magazine. do best in low light conditions, making them a perfect chice for nearly any marine aquarium, to quote the article. also says, if you tank uses comact fluorescent lights ( or even standard fluorescent lights ), you can still keep mushrooms. in thaks with metal halides, you simply need to put these corals under a ledge or in some area that is shaded from the bright light. they have no requirements for feeding, they get all the nutrients they need from leftovers floating in the tank, and they really dont have any other specific requirements for care. because they are aquacultured, grow quickly and are available in a variety of colors, mushroom anemones are the perfect choice for home aquaria.
i quoted that from the article.