Ctenophora:

Organization:  Tissue level

Symmetry:  Radial

Coelom:  Absent

Segmentation:  Absent

Arrangement of embryonic layers: Diploblastic

Digestive system:  Incomplete (both intercellular and extracellular)

Circulatory system:  Absent

Respiratory system:  Absent

Habitat:  Marine

Sexuality: Hermaphrodite (sexes are not separate, egg and sperm are produced in same individual).

 Notochord: Absent

 Reproduction:  Sexual

Fertilization:  External and indirect

Distinctive features:

• Commonly known as sea walnuts or comb jellies.
• The body bears eight external rows of ciliated comb plates, which help in locomotion .
• They show a distinct property of Bioluminescence (the property of a living organism to emit light).