Rhopalial lappet

From Freepedia

Rhopalia (singular rhopalium) are sensory structures of jellyfish of the class Scyphozoa. They include specialized structures for sensing light (ocelli), or movement or direction with respect to gravity (statoliths). The 'eyes' are most complex in the Cubozoa, resembling the image-forming eyes of squid, octopuses, and vertebrates.