Kryptonite Jawbreaker
A variant of Discosoma (Red Mushroom) (Discosoma sp.)

Photo: Kevmin · CC BY-SA 3.0
Representative Discosoma (Red Mushroom) image. A confirmed image of this exact morph isn't available yet.
A glowing green member of the Jawbreaker group, marked with dark splatters across a nearly smooth disc. That smooth surface sets it apart from the bubbly Kryptonite Bounce.
Other Mushroom Corals variants
Red / CrimsonBlueSupermanSuperman DiscosomaJawbreaker MushroomEclectus JawbreakerCandy Crush JawbreakerDeadpool JawbreakerLava LampCritical MassNorthern LightsPurple MonsterRed DevilNeglecta MushroomLeopard MushroomIronmanBlue Spotted MushroomKing's CrownStarburst MushroomStriped MushroomSpotted MushroomMetallic Aqua Mushroom