Give the main features of coelenterates

Give the main features of coelenterates.


  • Diploblastic animals with tissue level organisation in the body.
  • The body is radially symmetrical.
  • The body bears tentacles supplied with special stinging cells called cnidoblasts.
  • There is a cavity in the body.
  • Body is made of two layers of cells.
  • Simple gonads without gonoducts are present.
  • Reproduction is usually asexual (budding) in polyp form and sexual in medusae form.
  • They show polymorphism.
    Examples: Hydra, Obelia and jelly fish.