How are zoas named? And do variants have a different name?

[martinmcnally]

It depends. Do you mean the common name like Purple Hornets or the actual scientific name like Zoanthus sociatus

The common name is simply that, given by whoever and differs depending on who you talk to.

The scientific name would be given depending on the characteristics and molecular breakdown of the zoa however they don't necessarily take color into consideration so you can have many many zoa colones of different colors all with the same scientific name.