Case file · Cryptid
The 'bio-duck' of the Southern Ocean
A quacking, repeating sound heard by submarine crews in the Southern Ocean since the 1960s and nicknamed 'bio-duck' was identified in 2014 as the call of the Antarctic minke whale.
2014 CE · -64.00, -55.00 · status: explained
The account
Researchers led by Denise Risch matched the sound to tagged minke whales off the Antarctic Peninsula. Position approximate.