1. Cnidaria Versus Ctenophora
Comb Jellies – YouTube
Plankton- Ctenophores - YouTube
Cnidaria Versus Ctenophora

2. Phylum: Ctenophora “comb jellies”
use sticky cells or “colloblasts” to catch their prey
8 rows of stiffened ciliary combs that function as paddles
Glide smoothly through the water, unlike the jerky movements of a jellyfish
Ciliary Combs
Tentacle
Mouth
beroe feeding, aliens of the deep - YouTube

3. there are a little over 100 species discovered so far
Biradially symmetrical
all are hermaphrodites
Many are bioluminescent!
Comb Jellyfish - YouTube

4. Two planes, both including the axis of symmetry and at right angles to each other, are the planes of symmetry (Fig 2). One, the tentacular plane, passes through the two tentacle sheaths on opposite sides of the body. Another, the pharyngeal plane, passes through and includes the plane of the flattened pharynx. These two planes, and no other, divide the jelly into equal, mirror image halves.