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:
Pleurobrachia (Sea gooseberry)
  • Pleurobranchis (Sea gooseberry)
  •  Ctenoplana
  •  Cestrum (Venus girdle)
NudaClass Nuda: Their body is without tentacles.
Example of Nuda: Beroe
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