Tritonia festiva and Tritonia myrakeenae aren't talking, apparently.
Many thanks to Brenna for introducing this slug to me through her photos and then in person, because lordy, I would never have noticed if she hadn't pointed it out. I don't think I saw any that were over 1 cm, and they blend in perfectly with the octocoral that they eat. To find them, you basically turn over a rock and either look for the pair of white spots (which aren't always there), or little tan patches of goo that are... slightly gooier than the surrounding goo.
Saw my first Tritonia festiva in quite some time, and saw this orange morph for the first time.
Size 30 mm