Jellyfish are elegant and airy, but not as safe as you might think, looking at their semi-dome, 98% consists of water. Medusa kornerot (Rhizostoma pulmo). It is easily distinguished by the fluffy, similar to the bell, dome and heavy beard oral lobes underneath. On these blades and lace are poisonous stinging cells. Try gutter by their side; but generally regular nettle burns stronger than kornerot.