Ironman
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 smooth, mostly orange mushroom that sometimes picks up green streaks. Its surface has few or no bumps, so the colour reads as one clean sheet.
Other Mushroom Corals variants
Red / CrimsonBlueSupermanSuperman DiscosomaJawbreaker MushroomEclectus JawbreakerCandy Crush JawbreakerDeadpool JawbreakerLava LampKryptonite JawbreakerCritical MassNorthern LightsPurple MonsterRed DevilNeglecta MushroomLeopard MushroomBlue Spotted MushroomKing's CrownStarburst MushroomStriped MushroomSpotted MushroomMetallic Aqua Mushroom