It’s the saddest thing ever, and science should try to talk to it.
This is a fin whale.
Source: flickr.com
This is a blue whale.
Source: npr.org
Click here to listen to 52-Hertz (sped up 10 times). Most whales of its species create sounds between 15-20 hertz, which are incredibly and impossibly deep noises. The difference between the two types of sounds results in any nearby whales being unable to hear 52-Hertz's call at all.
Source: pmel.noaa.gov