Mysterious Humming Noise Coming From The Ocean Is Believed To Be... Fish Farts

March 14, 2016

For years, marine biologists have been puzzled by a strange humming noise that occurs in the ocean every day. They knew it wasn't whales or dolphins, and it didn't match other mammal communication patterns.

Now they think they've figured out what it is -- fish giving out gas.

fish farts ocean noise hum

Researchers from the University of California, San Diego, listened to the "buzz" through microphones dropped down as far as 3,300 feet underwater. They found out that the noise was particularly strong at sunset and dawn.

Scientists think the buzz comes from large groups of small fish and crustaceans that hide in the deep water during the day, and rise up near the surface to feed at night.

Simone Baumann-Pickering , a marine expert who worked on the study, says "it's known that some fish are considered to be farting, that they emit gas as they change depths in the water column.

"We're just scratching the surface in terms of understanding how important sound is."

The fish could be making the noise when they let off gas from their bladders to keep them bouncy. Or it could be that they are communicating with each other using the buzzing.

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