any of various stalked jellyfish of the class Staurozoa; a sessile medusa

comb jellies, also known as ctenophores

comb jelly; any of various marine animals in the phylum Ctenophora, characterized by groups of cilia they use for swimming

freshwater jellyfish of the genus Craspedacusta

jellyfish or medusa; also known as a medusoma in technical contexts

Portuguese man-of-war (Physalia physalis), a colonial marine organism known for its stinging tentacles and blue, sail-like float

immortal jellyfish; a species of small jellyfish capable of reverting to an immature colonial stage after reaching sexual maturity