Porphyra (Laver or Nori)
Scientific Name: Porphyra spp.
Category: plant
Brief Description
A genus of red algae commonly found on rocky shores, often appearing as thin, translucent, brownish or purplish sheets.
Characteristics
Thin, membranous thallus often only one or two cells thick. It has a rubbery, elastic texture when wet and becomes brittle and dark when dry. Colors range from olive-green to reddish-purple or brown.
Habitat
Intertidal zones of rocky shores, attached to rocks or other substrates.
When to Find It
Visible year-round, but often most abundant in late winter and spring.
Conservation Status
N/A
Ecological Role
Primary producer providing food and habitat for small marine invertebrates; plays a role in nutrient cycling in coastal ecosystems.
Easily Confused With
Ulva (Sea Lettuce) which is bright green, or Wild Nori (Pyropia) which is genetically related and very similar in appearance.
Observation Tips
Look for it clinging to rocks in the mid-to-high intertidal zone during low tide. Be careful as wet seaweed on rocks is extremely slippery.
Interesting Facts
Porphyra is the genus used to make 'Nori' for sushi. It has been harvested by humans for food for thousands of years and is exceptionally high in protein, iodine, and vitamins.