Stay Eat Events Weather Beaches

That Green Slime or Sea Goo on Oregon / Washington Coast: What Is It?

Published 04/02/21 at 10:05 PM PDT
By Oregon Coast Beach Connection staff

That Green Slime or Sea Goo on Oregon / Washington Coast: What Is It?

(Oceanside, Oregon) – It’s kind of intriguing, sometimes smelly, and it is truly slippery and fairly dangerous. It’s easy to slip on this dark green stuff covering rocky areas of the Oregon or Washington coastline and crack your head. (Above: sea lettuce in Oceanside)

Latest Coastal Lodging News Alerts
In Seaside:
Includes exclusive listings; major specials now that winter is here
In Cannon Beach:
Includes rentals not listed anywhere else
In Manzanita, Wheeler, Rockaway Beach:
major specials for winter
In Pacific City, Oceanside:
Winter's enticing specials now
In Lincoln City:
Major winter specials now
In Depoe Bay, Gleneden Beach:
major specials this season
In Newport:
Look for many specials
In Waldport
New amenities offered; specials and tempting prices now
In Yachats, Florence
Big deals available; lodgings not listed anywhere else
Southern Oregon Coast Hotels / Lodgings
Reedsport to Brookings, places to stay; winter deals

You can find it just about anywhere there are rocky slabs or terrain close to the ocean, but they are cause for caution.

What is it?

On Oregon and Washington beaches, it’s sea moss, sea lettuce, rockweed and sea cabbage. Mostly it’s two forms of sea lettuce.

One common kind of Sea lettuce, according to Tiffany Boothe of Seaside Aquarium, has the technical name of Ulva fenestrata, and Boothe said it is a green macroalgae that's distributed by the ocean from the Bearing Sea to Chile. It's actually found around the world and is composed of eight individual species. There is also the Sea Lettuce called Ulva intestinalis. Also called gutweed or hollow green weeds, it is a green algae with flattened green tubes.


Ulva fenestrata at Depoe Bay

Fenestra is more leaf-like. Intenstinalis is longer and grassier, but in some ways resembles green cotton candy.

You’ll also find Then there are the dead man's fingers (Codium fragile), which are dark green with fingerlike blades.


Various algae and a ghost forest at Sunset Bay, Coos Bay (photo courtesy Brent Lerwill)

There are other types of seaweed as well, but both kinds of sea lettuce are mostly what you’re looking at.

Boothe said sea lettuce is a very important food source as it feeds a myriad of sea critters. Sea urchins, crabs, nudibranchs and even fish feed on this delicious plant.

But the surprise is you could – technically – munch on it while on the beach.

“It is also consumed by humans in soups, salads, and as a substitute for nori (the popular seaweed used in preparing sushi rolls) in sushi,” Boothe said. “Nutritionally, it is very healthy. Not only is it high in iron and protein, it is also packed full of vitamins and minerals. In Scotland, Ulva has become quite popular.”

Boothe said sea lettuce can be found attached to hard substrates, such as pebbles, shells, or rocks, or they are free floating in calm bays and estuaries.

Both kinds of sea lettuce at Oceanside

You'll typically all this on low-lying intertidal areas at mostly rocky regions, like those at Sunset Bay in Coos Bay, Harris Beach near Brookings, Haystack Rock at Cannon Beach, Bandon, Yachats, Washington’s Rialto Beach or Waikiki, Oceanside, Depoe Bay and more. You won't find it on sandy beaches like Seaside, Waldport, Gold Beach, Newport or Lincoln City, unless there are patches of rocks around the tideline.

Still, there's more going on in these photos.

“I think you may be looking at two or three different species of seaweed, each with their own distinct characteristic and story.” Boothe said of some the photos provided.

Whatever you find, they’re the things that make you slip and fall on rocky areas, which is extremely painful as you hit the stones or slabs. However, if you’re lingering near an ocean edge, that’s where these things become life-threatening. If you slip on a place like that on the Washington coast or Oregon coast you’ll likely be gone.

Oregon Coast Hotels for this event - South Coast Hotels - Where to eat - Maps - Virtual Tours


MORE PHOTOS BELOW






Sea cabbage


Sea cabbage, next to Devil's Punchbowl, near Depoe Bay

Sea cabbage are the darker olive-brown, blade-looking things that are often quite large. Hedophyllum sessile can’t resist wave action too much, and you’ll find them up to two feet long.

Sea moss is also common. Endocladia muricata looks more like a browning old bush, and they’re not very big.


Marine gardens at Devil's Punchbowl: here it really lives up to its name with all sorts of algae

More About Oregon Coast hotels, lodging.....

More About Oregon Coast Restaurants, Dining.....

 



Coastal Spotlight


LATEST Related Oregon Coast Articles

Great Coastal Gale of '07 Tore Into Oregon Coast 15 Years Ago - Video
The storm changed parts of the region forever. History, Bandon, Coos Bay, Newport, Lincoln City, Manzanita, Cannon Beach, Seaside, Astoria
How Storms - Even Solar Storms - May Affect Whales on Oregon / Washington Coast
Why do they disappear? Does it disturb them at all? Marine sciences
Attending Seaside Aquarium This Month Helps Feed the Hungry on Oregon Coast -...
Patrons pay admission to the aquarium with two cans of food per person. Seaside events
Warm Sunsets to Raucous Oregon Coast Storms: Upclose at Cannon Beach's Schoon...
One of the major highlights is that beachfront lawn. Cannon Beach hotels, lodging reviews
Washington Coast Holidays Include Crab Pot Tree, Santa with Pirates, Music, Food
Holiday happs from Ilwaco up through Westport. Washington coast events
Famed Holiday Show Tradition Back on Oregon Coast, at Newport Performing Arts...
The Christmas Show! is finally back, Dec. 16 and 17. Newport events
Cyber Monday for Oregon Coast Too: Giving the Beach for Christmas
Give a night or two at the coast, or books, hoodies, T's. weather
Orcas Spotted Again on N. Oregon Coast - First Time This Pod Recorded Here
A pod of four were photographed on November 23. Marine sciences

Back to Oregon Coast

Contact Advertise on BeachConnection.net
All Content, unless otherwise attributed, copyright BeachConnection.net Unauthorized use or publication is not permitted