1. Ctenophora are exclusively marine, radially symmetrical, diploblastic animals
2. Organization : Tissue level of organisation.
3. Though they are diploblastic, their mesoglea is different from that of cnidaria.
4. It contains amoebocytes and smooth muscle cells.
5. They have eight external rows of ciliated comb plates (comb jellies) which help in locomotion,
6. They are called comb jellies or sea walnuts.
7. Bioluminescence ability is well noticeable in ctenophores.
8. They possess special cells called lasso cells or colloblasts which help in food capture.
9. Digestion - extracellular and intracellular.
10.Sexes are not separate (monoecious).
11.They reproduce only by sexual means.
12.Fertilization is external and development is indirect (larval stage called cydippid larva) Eg. Pleurobrachia and Ctenoplana.
