Phylum Ctenophora - sea walnuts or comb jellies

Phylum Ctenophora (sea walnuts or comb jellies) –

- Marine, radial symmetry, Diploblastic, tissue grade.

- Eight external rows of Comb Plates.

- Bioluminescence.

- Reproduction sexual.

- eg. Ctenoplana, Pleurobrachia etc.