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- Season 3
- Season 2
- Season 1
- Season 2 overviewJul 12-Sep 27, 20064 episodesSeason 2 episodes4. America's Underwater Treasures Sep 27, 2006
- The rusting wreck of the USS Monitor; natural city under the sea.
- 3. America's Underwater Treasures Sep 20, 2006
- Sea turtles lay eggs on the shore; coral among the Florida reefs.
- 2. The Gray Whale Obstacle Course Jul 19, 2006
- The struggles of gray whales as they make their annual migration from Baja to the Arctic.
- 1. Sharks at Risk Jul 12, 2006
- The decline of sharks could affect many other species in the food chain.