Porphyra: The Edible Seaweed
- Research project by Lisa Chen on this edible seaweed, commonly known as Nori, with much information including photographs and diagrams.
- http://www.mbari.org/staff/conn/botany/reds/lisa/index.htm

Purple Laver: Porphyra umbilicalis
- Photograph and basic information on this species with broad fronds.
- http://www.marlin.ac.uk/species/Porphyraumbilicalis.htm