I've seen them at stores around here, but they always insist it is a long-spin or pincushion. Almost got one a couple weeks ago but the employee kept insisting it'd destroy corals (well, actually that it'd destroy parts of the rocks, and the corals would be a side-effect). Not that I believed them, but that store uses the "if you won't listen then maybe we shouldn't sell to you" tone pretty quickly. :rofl:
I'm horrible at making IDs but viridis does look about right. Or at least something related.