Below you’ll see a few examples of common intertidal sea anemones, mostly from the surf-swept rocky shores of the northern Oregon coast. These are just the few I’ve come across and have photos of, not an exhaustive accounting. These easy to identify with the readily available field guides and online resources (see References, at the bottom of the page). There’s nothing new here, just some images I like and natural history notes if I can think of something that hasn’t already been said.
The organization more or less follows Lamb and Hanby (2005). Common names are my choice, usually some combination of those in Lamb and Hanby (2005), and Harbo (2011). I refer to WoRMS for scientific names, and I learn a ton by browsing the natural history riches in Kozloff (1993). All photos are from northern Oregon unless otherwise noted in the caption.
Short plumose anemone, Metridium senile
Under water, with it’s tentacles extended, it’s a beautiful anemone. I don’t too often see it on the exposed rocky shores of northern Oregon. These found favorable conditions on an overhanging rock wall.
Painted anemone, Urticina
This a good sized anemone. It’s one of the beauties of Pacific northwest shores. I’ve only encountered it on protected and semi-protected places. The color is variable.
Giant green anemone, Anthopleura xanthogrammica
Giant greens get my nod for best scientific name. An intimate view of the oral disk can be seen here.
Pink-tipped green anemone, Anthopleura elegantissima – This one has a lot of common names. I usually go with aggregating anemone, or pink-tipped. Unless there has been an accident, you’ll never see a lone pink-tipped; they only occur in dense aggregations. It is said that clones war with each other and that you can find lines of separation between clones. Anthopleura elegnatissima is featured in Aggregating Anemones Handle the Sand and Anthopleura elegantissima Lives Up to All Its Common Names.
Moonglow anemone, Anthopleura artemisia
Also known as burrowing or buried anemones, I’ve got to go with moonglow. Their tentacles come in quite a variety of colors. On the exposed outer coast, you’ll almost always find moonglows where sand meets rock.
Harbo, R. M. 2011. Whelks to Whales: Coastal Marine Life of the Pacific Northwest. 2nd ed. Harbour Publishing Co.
Kozloff, E. N. 1993. Seashore Life of the Northern Pacific Coast. 3rd ed. University of Washington Press.
Lamb, A. and B. P. Hanby. 2005. Marine Life of the Pacific Northwest. Harbour Publishing.
Sept. J. D. 2009. The Beachcomber’s Guide to Seashore Life in the Pacific Northwest. Revised ed. Harbour Publishing.
Biodiversity of the Central Coast’s Cnidarians and Ctenophores page