The photos are of the exact Rainbow Frankenstein Mushroom, WYSIWYG Live Coral for sale. It's roughly 2" across.
 
This Rainbow Frankenstein Mushroom is a top-tier collector piece that lives up to its name. If you’re looking for a mushroom with maximum color diversity, this is the one. It features the "Frankenstein" hot pink skirt with a mix of orange and blue scattered across a textured base. The "pincushion" effect comes from its unique polyp structure, giving it a dense, fuzzy appearance that adds a lot of detail to this coral.
 
Lighting: Mushroom corals prefers lower to medium lighting. Avoid placing it directly under intense light, as this can cause it to bleach or lose its vibrant coloration. A good starting point is the sand bed or a shaded area on your rockwork.
 
Currently kept under Kessil A360X units. Mounting height 24" above water line. 12:00PM - 10:00PM at 100% blue intensity.
 
Water Flow: This coral prefers low to very low water flow. Strong, direct flow can cause the mushroom's tissue to retract and prevent it from opening fully. It can also cause the coral to detach from its frag plug and get blown around the tank.
 
Feeding: While not strictly required, occasional supplemental feeding can help promote faster growth and enhanced health. You can spot-feed the Sunfire Ricordea with small, meaty foods like finely chopped mysis shrimp, brine shrimp, or high-quality coral pellets. Feed it when the lights are off or at a low setting.
 
Placement: The ideal placement is on the sand bed or a lower section of your aquascape where it receives gentle flow and lower light.