Don't feel like an idiot. There's several hundred species of Sinularia and many have similar looking growth forms. Mine is the only species I know of that I can provide paperwork from a world respected taxonomist, Dr. Micheal Jaines in Pheonix, AZ, proving it is what it is. Sinularia foliata is one of several dozen different speicies found in Palau and was one of the species nearly wiped out by the El Nino event in '98 and current research only has it identified in one local. Ironicly most if not all of the aquacultured "Nepthia" Palau Green Fingers available are actually in the genus Sinularia and not in the genus Nephthia.
Tim, you're my hero/what I want to be when I grow up. If I ever actually grow up that is, lol.
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