Production of seaweeds by culture practices is done generally by vegetative propagation of small fragments of some agarophytes, alginophytes and carrageenophytes. Gracilaria edulis and Celidiella acerosa reach harvestable size after 2 and 21/2 months respectively when the seaweed is harvested and processed for agar extraction. India has a good scope for starting a seaweed culture industry based on the know-how available at the Central Marine Fisheries Research Institute.