H. crispa is their only natural host and my concern would be keeping a carpet, long-term in the cooler waters that A. latezonatus needs. The only two species of host anemone that are found in the cool waters where latz and A. mccullochi originate are E. quadricolor and H. crispa. Since both of those species of anemone are readily available, I personally would opt for a natural host.