This is a rarely seen flatworm and this particular individual was TINY — 12 mm or 1/2″  at best.  It may be a juvenile as its white speckles have yet to form a continuous central line, and they are much larger in proportion to its body than those photographed by Cory Pittman on John Hoover’s Hawaii Flatworm site. Found in the crevice of a rock in an area of tide pools in Ma’alaea Bay, Maui.