Nintyseven percent of our planet is under the sea, the vast majority of it never explored. Although this is currently out of range for a Master Naturalist field trip, there is a lot to learn there. Recently there have been a number of stories highlighting a variety of new discoveries, such as those described in the article at LiveScience. Who knew that Dumbo could swim!
If you have six minutes to burn, a great way to spend it is at the site of TED underwater. The deep water bioluminescence is amazing by itself, but wait until you catch the camouflage of the cephalopods. Check out the squid behaving as lounge lizards and the amazing disappearing octopus.