Seaweed

I think it's a type of Laminaria seaweed

They remind me of ribons.....

Yes they are like ribbons. They can get very big.

And they are very slippery-when the tide is low be careful stepping on them!

Good for the compost heap! When I lived by the sea I would bring a carrier bag or 2 back with me when I'd walked the dogs.

Thats a good idea chloris............