Popular Science magazine has a great article about a new AUV that recently completed initial testing. You can view video of that bot here:
This one Gives a better view of the bot!
For those who stumbled onto this site accidentally, an AUV is an autonomous underwater vehicle as opposed to an ROV or remotely operated vehicle. More videos are available on You Tube.
I can't look at someone else's bot without thinking about the things I see in someone else's design that I would like to incorporate into my next build! On this one I really like the sampeling device!