Rhodophyta
- Article by Jean-Marie Cavanihac on the red seaweeds and their complex reproductive cycles, with many fine images of the processes involved.
- http://www.microscopy-uk.org.uk/mag/artsep05/jmcrodo.html

The Intertidal Rocky Shore: Coralline Algae and Green Seaweed
- Photographs of about 6 species of encrusting varieties of algae and about 10 of green seaweeds that grow around the coasts of New Zealand.
- http://www.seafriends.org.nz/enviro/habitat/rsgreen.htm#green

The Intertidal Rocky Shore: Red Seaweeds
- Photographs of about 30 species of red algae that grow around the coasts of New Zealand.
- http://www.seafriends.org.nz/enviro/habitat/rsred.htm

Life Cycle of Red Algae
- Diagram showing the reproductive structures of red algae and further information on their life history.
- http://www.rbgsyd.nsw.gov.au/science/hot_science_topics/aussie_marine_algae/life_cycle

Chondria coerulescens
- Photograph and basic information on this species with blue iridescence which grows on pebbles in mud.
- http://www.marlin.ac.uk/species/Chondriacoerulescens.htm

Red Algae
- Information from Wikipedia on these seaweeds, their place in the fossil record, taxonomy and classification.
- http://en.wikipedia.org/wiki/Red_algae

Rhodophyta: Red Algae
- Information on the characteristics of this group of seaweeds with details of the life cycle of Palmaria and Coralline algae.
- http://www.seaweed.ie/algae/rhodophyta.lasso