Coelenterata consists two phylum Ctenophora (comb jellies) and the Cnidaria (coral animals, true jellies, sea anemones, sea pens, and their allies). They are radially symmetrical, and diploblastic. These animals are acoelomates and they do not possess ahead.

Coelenterates exhibit radial symmetry

Radial symmetry is a type of symmetry where an organism is arranged symmetrically around a central axis, like spokes on a wheel. Coelenterates, such as jellyfish and sea anemones, exhibit radial symmetry in their body plans.




Characteristics of radial symmetry in coelenterates:

- Coelenterates have a cylindrical or saucer-like body shape that is radially symmetrical.

- Their body parts, such as tentacles and oral openings, are arranged around a central point.

- This symmetry allows coelenterates to capture food and respond to stimuli from any direction.

- It is an adaptation that helps them thrive in aquatic environments where food and threats can come from any direction.




Examples of coelenterates with radial symmetry:

- Jellyfish: These marine animals have a bell-shaped body with tentacles hanging down, exhibiting radial symmetry.

- Sea anemones: These creatures have a cylindrical body with tentacles radiating outwards from a central mouth, showing radial symmetry.

- Corals: Coral polyps have a radial symmetry with tentacles surrounding a central mouth, allowing them to capture prey efficiently.




Conclusion

In conclusion, coelenterates, such as jellyfish, sea anemones, and corals, are prime examples of organisms that display radial symmetry in their body plans. This adaptation is crucial for their survival in aquatic environments and helps them effectively capture food and respond to their surroundings.