Ultra Rainbow BTA
A variant of Bubble tip anemone (Entacmaea quadricolor)

Representative Bubble tip anemonephoto — a dedicated image of this exact morph isn't available yet.
A higher-grade rainbow morph selected for stronger patterning and more saturated multicolor (red, orange, green, pink, often with acid-splash speckling) than a standard rainbow BTA.
📜 Backstory
Sold by Corals Anonymous, Reef Chasers, New Wave Aquaria, Queen City Corals, Staub Aqua Farm and Reef Geeks of Chicago, among others. 'Ultra' denotes a higher color grade of the natural rainbow form rather than a separate species or a single named collector's line; pieces are aquacultured splits.
Keeper tips for this variant
Like the standard rainbow, it colors up best under moderate-to-high light; keep flow moderate and acclimate light slowly so it doesn't bleach the extra color out.