Card Set Information
aquatic, mostly marine
first group of animals to achieve...
tissue level of organization
ectoderm (outer skin)
endoderm (inner skin)
use cnidocytes (venom containing cells) to capture prey.
2 body formss
Polyp- attaches to a surface and has tentacles pointing upward
medusa- jellyfish, free swimming, tentacles pointing downward
venom containing cells capture prey
use stinging filament
which shoots out from the cell at the slightest touch, to inject venom into prey