Shark Week's SharkCamTwo live video high-definition cameras at the Georgia Aquaium allow you to view sharks, whale sharks and manta rays live. You can even control one of the cameras.
(Click on Multiview for underwater camera.) video. The live camera feeds will begin at the end of July 2013.
Also checkout the International Fund for Anmial Welfare (IFAW):
Russian Beluga Whale Nursery
The Telepresence Network
For more information and pricing. You will also receive alerts when new underwater video cameras come on-line.