Characteristics: Body oval to elongate, color translucent clear, covered with opaque white and dark brown spots. The viscera shows through in the central region as a pale orange or pinkish area. Around the mantle edge there are dark brown lines aranged at right angles to the edge. In some specimens there is a yellow border. They are yellowish, white-tipped, whit a few spots of brown, and are able to retract into a raised sheath. The five thickened gills are also yellowish, becoming white at the tips.