By John Sepulvado
http://stream.publicbroadcasting.net/production/mp3/kazu/local-kazu-528016.mp3
Moss Landing – Listening to the ocean could get a whole lot easier thanks to a hi-tech underwater glider. Learn more about the mystery of the "BLOOP." Cold war era hydrophones picked up this bubble sound in the late 90's. They think it could come from a yet undiscovered animal larger than a blue whale.
Click here to learn more about the bloop.
Click here to hear other mystery sounds recorded by underwater hydrophones.