FInelined Flatworm, Pseudocerotid E.
These flatworms are tiny and quite honestly I thought it was a tiny chiton the first time I saw one — until it moved ever so slightly. In all three sightings, these flatworms were found wandering about during the day on some algae or rocks in the North Kihei and Makena Landing areas of Maui (in relatively shallow water). Katie Samuelson’s photos of this species look a little more like this one than those of Cory Pittman’s, but for now it is assumed that these are indeed rare sightings of a Fine-lined Flatworm.