Case file · Cryptid
The Western Pacific 'biotwang'
In 2014 underwater recorders near the Mariana Trench picked up a strange metallic five-part call, which was widely described as 'unexplained' when published in 2016.
2014 CE · 11.35, 142.20 · status: explained
The account
NOAA scientists concluded it was very likely made by a Bryde's whale, a call type not recognised before.