The only natural hosts for A. percula are: Heteractis crispa; H. magnifica; Stichodactyla gigantea.
S. haddoni is a natural host to the following species of clownfish: A. akindynos, A. chrysogaster, A. chrysopterus, A. clarkii, A. polymnus, A. sebae.
Sometimes fish will accept as a surrogate host, an anemone that is not one of their natural hosts. This is more or less a hit or miss proposition.