Home » Rhodophyceae is called red algae because of the pigment Plant kingdom MCQs Rhodophyceae is called red algae because of the pigment January 31, 2022 11 Views Q. Rhodophyceae is called red algae because of the pigment A. Fucoxanthin B. Phycoerythrin C. Carotenoids D. Chlorophyll c Answer: Phycoerythrin