I saw this a couple days ago. It was stuck in the tentacles of one of my purple gigs. The disk color doesn’t show up very well, but is purple and the foot is tan. Same coloring as the gig I sucked it out of. They seem to need specialized care this small. One day I hope to try to get one to grow. The flow in the tank is way too high for them this small. Second pic shows a little of the purple color the best.