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.Q. Rhodophyceae is also called as red algae because of the presence of a pigment called r-phycoerythrin.TrueFalseAnswer: True