Eye of Sauron
A variant of Zoanthids (Zoanthus sp.)

Photo: Kazvorpal · CC BY-SA 3.0
Representative Zoanthids image. A confirmed image of this exact morph isn't available yet.
A flame-orange zoa circled by dark purple. The look calls to mind the burning eye it is named after.
Other Zoanthids variants
Eagle EyeRastaBrown/wild button polypsBlue HornetRainbow IncineratorPeople EaterUtter ChaosFruit LoopsSunny DWWC BowsersArmageddonGorilla NippleDaisy CutterTubbs BlueMagicianGobstopperBlow PopPink ZipperKrakatoaSpeckled KrakatoaGrand Master Krakatoa (GMK)Whammin WatermelonBam BamDaisy DukeKing MidasMy ClementineGoblins on FirePink DiamondsLunar EclipseNuclear GreenArmor of GodBob MarleyPandoraWildflowerRainbow HornetJF BloodshotEye of RaGreat Owl ZoaPunk RockerPurple HornetBlueberry FieldsStratosphereQueen StratSupermanKryptonitePlayboy BunnyDarth MaulSakuraGreen Bay PackersBlue AgaveChucky's BrideGod of WarBlack Hole SunBlue SteelCat's EyeCreamsicleIncredible HulkFrozen ArmageddonNebulaAngel WingsStarscreamSun EaterJungle JuiceMandarinSolar FlareKung Fu FighterDeath StarNirvanaMean GreenScrambled EggsRed HornetStrawberry WineMiami ViceMary JaneTaserPink KrakatoaBlue Eyed BlondesAOICandy Apple RedAlien AntivenomGatoradeOompa LoompaSweet ToothOrange OxideSonic FlareSpace ChaosWhite ZombieBloodsuckerKedd's RedsMohawkCandy CrushFairy MuncherUltimate FireToxic RainTequila SunrisePurple HeartOrange Dragon EyeMambo JamboPumpkin SeedsLittle Shop of HorrorsYellow SubmarineFrozen NebulaCharmanderBlue Boo BerryVampireSour PunchPacmanFake ChiliNightmareRasta CousinsOrange RainbowSpellbinderGod BeastPredatorFrozen HornetTiger HornetJawbreaker HornetMurder HornetAcid RainSuperstarZombie EyeInsane RainbowPunch DrunkSafecrackerMystiqueBansheePrometheanTwizzlersAphroditeLaffy TaffyEmeralds on FireAtmosphereAntimatterLA LakersTutti FruttiAwesome BlossomBlack BellaExosphereSnowglobeSuper SaiyanGold MaulHalle BerryKoala EyesFruitopiaPerennial DanceOmegaRing of Fire