If it quacks like a duck, it turns out it’s actually an Antarctic minke whale.
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The mystery of what is making a loud quacking noise in the ocean - which has puzzled scientists for decades - has been solved, researchers claim. Apparently it's the Antarctic minke whale and not, as you might have assumed, a giant duck.
The bizarre, repetitive sound, known as the "bio-duck", was first recorded in the Southern Ocean by submarine sonar operators five decades ago. But until now, scientists haven't been able to pin down what was actually making the noise.
The answer comes in a paper published in the Royal Society journal Biology Letters.
