Purple Laver (Nori)
Scientific Name: Pyropia spp. (formerly Porphyra)
Category: plant
Brief Description
A sheet-like marine red alga found on rocky intertidal shores, often appearing brownish-red or purplish when wet.
Characteristics
Deep reddish-brown to purple color, extremely thin and translucent (one or two cells thick), rubbery texture when wet and crispy when dry. It lacks a true stem or roots.
Habitat
Intertidal rocks and pebbles in the high to mid-tide zones of coastal areas.
When to Find It
Found year-round, but most visible and lush during the spring and summer months.
Conservation Status
Common / Least Concern
Ecological Role
Provides food for various marine invertebrates and snails; serves as a primary producer in the coastal ecosystem.
Easily Confused With
Often confused with Red Laver (Wildemania) or species of Ulva (Sea Lettuce), which is green. It can be distinguished from other red seaweeds by its incredibly thin, sheet-like blade.
Observation Tips
Look for these slippery sheets clinging to rocks or scattered on pebble beaches in Washington state during low tide. Be careful as wet rocks and seaweed are very slippery.
Interesting Facts
Pyropia is the genus used to make Nori, the seaweed wrapping for sushi. It has been a traditional food source for Indigenous peoples of the Pacific Northwest for millennia.
User Notes
Washington state beach