Phylum Rhodophyta (Red algae)
1) The photosynthetic pigments include red pigments (phycoerythrin) and blue pigment (phycocyanin) apart from chlorophyll, of which red pigment predominates. However, the range of colour is from green to red, purple or greenish black.
2) They can be single-celled and filamentous, or may be large with apparently a more usual plant like body.
Example : Rhodomela.