Phylum Ctenophora (Comb Jellies): General Characters
- Grades of Organization: Tissue grade.
- Symmetry: Radial symmetry.
- Germ Layers: Diploblastic
- Coelom: Acoelomate
- Habit and Habitat:
- Exclusively marine.
- Solitary & pelagic
- Digestive System:
- Incomplete.
- Intracellular & extracellular digestion.
- Respiratory System: Absent
- Circulatory System: Absent
- Reproduction:
- Only Sexual.
- Hermaphrodite.
- External fertilization.
- Development is indirect.
- Unique Features:
- Locomotion is by 8 vertical external rows of ciliated comb plates.
- Tentacles present.
- Shows Bioluminescence (property to emit light from the body).
- Examples:
