Metallic Aqua Mushroom
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 small aqua-blue mushroom with a metallic glint across its surface. Single polyps are usually under an inch wide.
Other Mushroom Corals variants
Red / CrimsonBlueSupermanSuperman DiscosomaJawbreaker MushroomEclectus JawbreakerCandy Crush JawbreakerDeadpool JawbreakerLava LampKryptonite JawbreakerCritical MassNorthern LightsPurple MonsterRed DevilNeglecta MushroomLeopard MushroomIronmanBlue Spotted MushroomKing's CrownStarburst MushroomStriped MushroomSpotted Mushroom