There are a few species of seaweed that you absolutely must be able to identify. These are the ones that define some of the Shorekeeper habitats.
Here is a list of references that we have found helpful for identifying algae in the field:
Harbo, R.M. 1999. Whelks to whales. Harbour Publishing, Madeira Park, B.C. 245pp.
Kozloff E. N. 1996. Seashore life of the northern Pacific coast. An illustrated guide to northern California, Oregon, Washington, and British Columbia. University of Washington Press, Seattle. 4th Edition. 370pp.
McConnaughey, B.H., McConnaughey, E. Pacific Coast. 1985. A comprehensive field guide, fully illustrated with colour photographs, to North America's Western Shore. Chanticleer Press, Inc., New York. 633pp.
Scagel R.F. 1971. Guide to the common seaweeds of British Columbia. British Columbia Provincial Museum Handbook No. 27, Victoria. 330pp. (Out of print, check second hand book stores)
Pictures and Descriptions of Some Common Seaweeds
[This section may start out with only a few examples but should grow and evolve??]