The BBC has produced a wonderful series of documentaries on Earth's oceans. Here, for your viewing pleasure is Part 1 of 6 in a voyage of discovery into the Sea of Cortez. Parts 2 thru 6 follow. Each is 10 minutes long. Get a cup of coffee or something and some snacks. Sit back and watch. Enjoy.
If you want to view all of this directly on YouTube, go to http://www.youtube.com/watch?v=H7IZQxK6cAc
Or you can purchase the entire series on DVD from Amazon UK