It's real. They're on opposite ends of the aquarium. There was a video special Nat Geo made on pimas, and this was part of it. It's safer to be in the water with them than above water, where they can jump with incredible force and cause damage equivalent to a car crash. Jeremy Wade was hit by a small one directly in the chest. His doctor said that the wound was very similar to being struck in the chest by the steering column of a car. Impressive animals!