Speaking of sharks, I saw on the tube two jet skiers motoring through a school of hundreds of sharkss. From a helicopter, the dramatic irony was off the charts.
As far as the Hobie kayak is concerned, I have a buddy in Fla. who is a .com retiree who loves his. Fishes every day (usually out of his Maverick) and swears by it. He says that it's much more eficient than just a paddle, and I belive him. All the human powered records are powered in the recumbant possition.