Rhodophyceae is also called as red algae because of the presence of a pigment called r-phycoerythrin. HomeAlgae MCQsRhodophyceae is also called as red algae because of the presence of a pigment called r-phycoerythrin. Share your love WhatsApp Facebook Telegram Twitter Pinterest Q. Rhodophyceae is also called as red algae because of the presence of a pigment called r-phycoerythrin. TrueFalse Answer: True