People say these are green sea mat zoas. Is it true? If not, what is it?

Zoanthid sp.

What type?

all the names are made up anyway. Make one up yourself...
or
zoaid.com

looks to zoaid.com for names. The names are just a marketing scheme to make more money. They don't look like any of the popular "big name" zoas, so it can be 500 different little known names that some college reefer (who was probably stoned at the time) made up.

Yeah names for things to market them are lame.

I just want to buy "fast red car with silver wheels" and "little white dog with poofy tail".

I like the names to market them. I seem like I am the only person.

I like the zoa names as well.