The Scyphozoa or true jellyfish are pelagic Cnidarians which swim in open water thanks to the movements of their umbrella.
Staurozoa are small sedentary jellyfish that adhere to algae by an extension of the umrella.
Cnidarians have a single orifice, the mouth, which is surrounded by tentacles. They are radially symmetrical animals.
They are characterized by the presence of stinging cells, cnidoblasts, which allow them to neutralize their prey, hence their name (from the Greek cnid- = nettle).
Chrysaora hysoscellaCompass jellyfish
Pelagia noctilucaMauve stinger
Cyanea lamarckiiBlue jellyfish
Aurelia auritaMoon jellyfish
Discomedusa lobataRing jellyfish
Cotylorhiza tuberculataFried-egg jellyfish
Rhizostoma octopusBarrel jellyfish
Rhizostoma pulmoMediterranean barrel jellyfish
Haliclystus auriculaKaleidoscope jellyfish
Haliclystus octoradiatusOctaradiate stalked jellyfish
Calvadosia campanulataStalked jelly-fish
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