#3 is a Protopalythoa of some sort,,there are some desirable morphs in the Protopalythoa genus but sadly there are more "pest" types for say.
be careful cause some of the pest types are very invasive and very potent with palytoxin..
Its up to you if you like them.
I have a "few" polyps of Protos,,just a a few,,wink wink