Cauliflower Jellyfish - Cephea cephea - Broadly distributed in waters from the mid-Pacific through the Indo-Pacific to the Red Sea and the Atlantic off West Africa. It can reach a diameter of 19.68-23.62" / 50-60 cm. Reports exist of sea turtles feeding on this jelly
16 Underwater Photos - Scuba Diving In Belize Barrier Reef
I know they are harmless (unless provoked) but I just don't like them! Moray Eel spotted in Belize.