I have never seen this before. Cormorants gather on a drifting giant kelp paddy on the open ocean where I saw them diving below then coming up in the kelp rubbing their backs on the seaweed. Another example of giant kelp being used to clean and/or remove parasites from an animal?
Phalocrocorax & Macrocystis pyrifera paddy 2014 10-09 SB Channel-001
A drifting paddy of giant kelp with a Heermann's gull on top and a California sea lion in the water. Giant kelp paddies like this are oasis for life on the open ocean.
Macrocystis pyrifera drifting paddy Zalophus & Larus heermanni 2014 09-09 SB Channel-x-014
Clear and blue Velella velella jellies are seen entangled in giant kelp and surf grass on the open ocean. Velella is propelled by wind across the open ocean and may get "stuck" when it collides with detached giant kelp paddies.
Macrocystis Velella Phyllospadix paddy 2014 08-13 SB Channel-c-021