Shot in the basement of the California Academy of Sciences (CAOS! heheheh). An alligator gar prowls above the ceiling of the "Amazon Flooded Forest" tunnel. Above is the "Rainforests of the World" sphere.
The entire basement level is a series of aquaria, some of which are also visible from the ground floor. Mostly natural daylight coming down through the building's skylights. Makes for some spectacular shooting, especially if you can find a place without a crowd of people in the way.