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Introduced by Peter Scott
At the Miami Seaquarium in Florida you can watch many large deep sea creatures at close quarters, including sharks, swordfish, moray eels, and octopuses. In this programme dolphins leap high out of the water to receive food from the hands of their trainers, and a surgical operation is performed by vets under water to remove a stone from the inside of a huge fish.

(BBC recording, previously shown on July 24)