Toxic Green / Neon Green Cabbage Leather (Sinularia)
A variant of Finger leather coral (Sinularia sp.)

Representative Finger leather coralphoto — a dedicated image of this exact morph isn't available yet.
A fluorescent toxic/neon green form of the cabbage-type Sinularia (S. dura/brassica), forming ruffled, folded plates rather than fingers and glowing bright green under blue light. A sister growth-form of the finger leather within the same genus.
📜 Backstory
Sold under names like 'Toxic Green' and 'Neon Green Cabbage Leather' by vendors including Tidal Gardens, The Reef Farm, Vivid Aquariums and LiveAquaria (Green Cabbage Leather). Reef Builders notes the neon cabbage form is now widely available, with much of it tracing to Australia and Bali. It is genus Sinularia (an octocoral) but a distinct cabbage growth-form, so it is sometimes lumped with finger leathers in the trade; precise colony lineage is undocumented and origin is debated.
Keeper tips for this variant
Moderate light and moderate flow; like other Sinularia it benefits from enough flow to shed its waxy coat and to keep detritus from settling in the folds. Running activated carbon helps manage any terpenes it may release toward sensitive stony corals.