Polyclad Flatworm

The dorsal background varies from a mottled olive green to lime green and white pattern; large irregular brown and olive green spots on the margin and large irregular orange-brown and white spots scattered over the dorsal surface, darker medially. Presence of a narrow yellow rim and the gut diverticula is usually green. The ventral side is light olive green.
Source : http://polycladida.lifedesks.org/pages/3200