The ctenophora are a small group of solitary, free swimming , marine, planktonic animals closely related to coelenterates. They are commonly called comb jellies.
Phylum ctenophora are grouped into two classes: Tentaculata and Nuda
Class Tentaculata: They have long aboral tentacles.
Example of Class Tentaculata:
- Pleurobranchis (Sea gooseberry)
- Ctenoplana
- Cestrum (Venus girdle)
Class Nuda: Their body is without tentacles.
Example of Nuda: Beroe