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The main characteristics of Rhodophyceae are:

  1. The members of the family are commonly known as red algae.
  2. The characteristic red colour of the algae is due to the presence of phycobilins.
  3. Most of the members are Marine.
  4. Cell wall contains agar and Carrageenin.
  5. Food is stored in the form of floridean starch.
  6. Motile stages are absent in red algae.
  7. Vegetative reproduction by fragmentation, asexually by non-motile spores.
  8. Sexual reproduction occurs by oogamy.
  9. Fruiting body of the red algae is known as Cystocarp.