strobilation and not during gastrulation. In most schyphozoa and cubozoa, sessile polyps undergo a secondary round of metamorphosis in order to become free-swimming, sexually mature medusae, generally entailing a process known as strobilation. During strobliation, a single polyp, which is now dubbed a Strobila, is set to undergo a process of transverse fission, which will result in the generation of one or multiple juvenile medusae, consequently referred to as ephyrae. Each free-swimming ephyra (singular) develops into an adult medusa, which has come to possess a rhopalial nervous system that it did not previously possess. When the process of strobilation is at its genesis, before rhopalia begin their formation, small swellings manifest at the bases of specific tentacles in the polyp; these will become the sites of rhopalial development. The tentacles degenerate in length, and the margins of the swellings bulge out to form “rhopalar arms”. The rhopalial arm's distal end, formations called lappets begin to form, which are used for sensing and consuming food. Before ephyrae detach from the strobila, electrical impulses from the rhopalia have been observed in direct correspondence with pulsatile contractions of movement that begin when the ephyrae are becoming ready to be free-swimmers. This suggests that the sum of the connections that synapse within the rhopalia, along with the swimming musculature, all develop during the strobila stage. Observations point to the conclusion that the gravity-sensing portion of the organ consisting of the lithocyst and the touch plate most likely develops first, preceding the neuropil cluster within the center of the rhopalia, and then finally the ocelli, which exhibit the highest degree of cellular complexity and require the most energy to develop. Phylogenetic variations/manifestations in Cubozoa Cubozoa rhoplaial structures and ocelli are the most complex of Cnidarians, and resemble the image-forming eyes of squids, octopuses and vertebrates. They possess rhopalia that are structurally similar to those of the scyphozoans, but the variation of cell types and specifically ocelli are more complex within Cubozoa. Cubozoan rhopalia also occur in multiples of four, where at least one rhopalia is embedded within the skirt of each side of the box jelly. Each rhopalial organ is lined with six total eyes of four varying morphological types. On each, there are two lens eyes, the upper and lower eye, accompanied by two different pairs of simpler pigment-pit eyes, summing to a total of 24 eyes per organism. Rhopalial ocelli and regeneration Ocelli