Thuridilla bayeri reaches 4 cm. Small sacoglossan (Plakobranchidae) Indo-Pacific with spectacular colors: black body with vivid yellow-orange longitudinal lines and blue spots, wavy blue parapodia with yellow-orange edge. Lives from 5 to 25 m on algae of coral reefs of central and western Indo-Pacific. Sap-sucker. Trophy macro photo subject for its spectacular colorful design, one of most beautiful Thuridilla.
