The narrator calls the sea lions in the movie "seals."
Even though the movie happens on Anacapa Island, some scenes are clearly not on Anacapa Island. The scene with a huge number of sea lions and elephant seals is taken at Bennett Point, on San Miguel Island. Another scene is clearly not on Anacapa Island, since the scene shows trees and no trees exist on Anacapa Island (it's too windy most of the time, and there's no source of fresh water. It had to be brought in by ship for the lighthouse keeper).