Siegfried Matull captured a photo of two Harbor Seals that surfaced under a mat of kelp. The photo looks as if they had been crowned by the kelp. Many thanks to Siegfried for allowing me to share his photo.
And here is a description of what it's like to dive in kelp, from diver Jack Likins:
"When I dive under the kelp it is like being under a very thick redwood forest canopy. The sunlight filters through the matted kelp on the surface and down the stalks with schools of small fish glistening as they swim through the sunbeams.”