I did have a nice over flight of a kelp forest late this fall. The water was clear enough that at times a bit of vertigo would hit. Don't have a lot to say about the importance of this habitat other than vague understanding that they support a lot of species. Not sure if sea otters ever lived in the San Juans for example, but there is an important association.
Posting ability has been a bit restricted due to travel ventures - mind is mostly concentrated on non Washington landscapes.