Submariners’ 'bio-duck' is probably a whale

Submariners’ 'bio-duck' is probably a whale

Acoustic tags suggest Antarctic minke is source of mysterious sounds

By Susan Milius, 17:27 PM April 22, 2014

It quacks like a duck, sort of. But the mystery creature of the Antarctic is more likely a whale.

Submariners in the 1960s recorded strings of quick heartbeatlike pulses and nicknamed the unknown source a “bio-duck.” Whatever it is sounds off mostly in winter and spring in the Weddell Sea off Antarctica and the waters off Western Australia.

The sound is “way too loud for a fish,” says marine biologist Denise Risch of Integrated Statistics in Falmouth, Mass. Listeners have proposed sources from ...

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