Just when you thought it was safe to go back to your computer, the London Aquarium has pointed a webcam at its shark-filled Pacific tank.
The five-second update on this camera is quite enough to get an impression of just how fast the Sand Tiger, Nurse and Brown sharks in the tank move.
Jaws author Peter Benchley may spend his time trying to protect sharks these days but his film still makes the blood run cold.
Not as relaxing as an ordinary fish tank but certainly more interesting.
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