Portuguese man-of-war (Physalia physalis)
something that one would not expect to exist; something exceedingly rare; (lit.) jellyfish bones
crown jellyfish (Coronatae spp.); coronated jellyfish
Nomura's jellyfish (Nemopilema nomurai)
jimble (Carybdea rastoni)
northern sea nettle (Chrysaora melanaster)
habu jellyfish (Chironex yamaguchii); habu-kurage
comb jelly (any jellyfish-like animal of the phylum Ctenophora)
freshwater jellyfish (Craspedacusta sowerbii); peach blossom jellyfish
Carybdeidae Tamoya (species of venomous box jellyfish)
box jellyfish (Cubozoa spp.); sea wasp