Jonathan Bird's Blue World is an Emmy award winning educational program that explores the wonders of the world's oceans.
The program airs on public television, but the website also has webisodes on the site for you to view. They also have an educators' section with study guides for each episode, sea stories and web links. You can even book him to come to your school and do a presentation (for a fee). He is very dynamic and you can see an example of one of his presentations.
Some of the episode topics include: Sharks, whales, airplane graveyard in the sea, tropical fish, manta rays, and much more. There is also a section with videos describing the SCUBA gear that they use when filming and exploring the oceans.
There is also a blog, http://jonathanbirdsblueworld.blogspot.com/, where they post information and news.
I found the program to be well done and very interesting and the resources on the site for educators were great. Definitely a great resource for your classroom.
On a side note, I actually went to college with Jonathan at WPI. He was two years ahead of me, but was in a band with a friend of mine. He's a great guy and it's great to see another engineer doing educational work.
some of the episodes: