What are those weird seaweed on Rialto Beach?

Question

They're very long and green and have a bulb on the end.

Answer 1

That would be bull kelp.  Here's a website with more info:

http://www.ecy.wa.gov/programs/sea/puget...

Answer 2

It's a form of kelp.

Answer 3

Bull Kelp.  The bulb part floats at the surface with leaves coming off of it.  The other end - where it looks like roots - is what holds onto rocks at the bottom of the ocean.  Not sure where Rialto Beach is but I've seen quite a lot of  Bull Kelp at Port Angeles on Dungeness Spit.  Here's some pics from a hike there on the beach.  When you see a bunch of it kinda looks like the entrails from some monstrous creature!

http://travel.webshots.com/photo/1448312...

http://travel.webshots.com/photo/1448313...

http://travel.webshots.com/photo/1448313...