Hypothesizing among scientists that deep sea fish make noise had been going on for half a century. That was based on the observation that fish possess organs which can be used for said purpose. In 2012, scientists managed to catch 12 distinct sounds believed to have originated from deep sea fish. Researchers from the University of Massachusetts lowered a hydrophone into the water over 2,200 meters deep and let it record for 24 hours. Typical noises of whales and dolphins were identified
but so were those 12 other unique sounds, which included grunting and quacking noises. Since most fish emit low-frequency sounds, its thought the noises could have originated from deep sea fish, such as monkfish. Because deep sea fish live in darkness, the noises might function as calls by which to communicate with each other. Think those fish would have some deep conversations? Let us know in the comments!