Scyphozoa
(“True” jellyfish)
l200 species- all
marine
lThick mesoglea
lNo vela
lAlternation of
generations
lMedusae sexual, giving rise to polyps
lPolyps sessile and asexual, giving rise to ephyra
Cubozoa
(Sea wasps)
lOne or more tentacles at each of the four corners of their medusae
lTropical and subtropical swimmers
lNasty stingers
lAmong most complex invertebrate
eyes
lAlternation of
generations
(Margulis, Schwartz: 1998;
and Kozloff: 1993)