Lord of the Rings
A variant of Palythoa (Palythoa grandis)

Photo: Nhobgood Nick Hobgood · CC BY-SA 3.0
Representative Palythoa image. A confirmed image of this exact morph isn't available yet.
A striped pink and purple morph with an intense green mouth. One reference files it as a zoa and another as a paly.
Other Zoanthids variants
Sunny Side Up PalythoaMaui Pink / Pink PalythoaPurple Death / Purple Deathstar PalythoaMagician / Devil's Armor PalythoaMagician PalythoaArmageddon PalythoaNuclear Green PalythoaBam Bam Orange Palythoa/ZoaGrandis 'Sun' PalythoaUtter ChaosCaptain AmericaCaptain JerkDaisy Duke's PalyRed People EaterButt MuncherSunny DWWC Emerald GrandisWWC Green GrandisPalythoa grandis (Cinnamon / Sun Paly)NightcrawlerRoyal PurpleSeductionMind TrickYodaPetroglyphHallucinationTyree Space MonsterBlue Death