The Bumpy, (Stellamedusa ventana) is a species of jellyfish, The species was first described in the Journal of the Marine Biological Association in 2004 by Kevin Raskoff and George Matsumoto of the Monterey Bay Aquarium Research Institute. As of February 2004, seven specimens have been observed, five off the California coast in Monterey Bay and two in the Gulf of California. Unlike most medusae, they lack marginal tentacles. Specimens so far found reach almost 10 cm in diameter, which is large for a scyphomedusa. The bell is blue-white in colour. The exumbrella is white, and this and the four oral arms are covered with large nematocyst-laden projections filled with stinging cells, enabling the jelly to capture food items of a variety of sizes; it seems to prefer large prey, up to half its