Weird noise traveling through walls and floors of a Florida city. What’s causing it?

The floors are mysteriously vibrating in one Florida city, and government officials have a strange explanation that has nothing to do with earthquakes or rising sea levels.

It’s fish, they say. Lots and lots of chattering fish.

“Are you hearing a strange noise inside your home? It is likely the sound of the black drum fish,” Punta Gorda officials wrote in a Feb. 14 Facebook post.

“Residents living along canals frequently hear black drum calls in their homes during the spawning season. This is possible because the low frequencies of these calls are able to travel through the ground and into the walls and floors of homes.”

The sound is not unlike a fuzzy bass guitar, and it’s being magnified by thousands of large fish thumping in unison. (Click this link to listen.)

Black drum grow to about 5.5 feet and they spawn “nearshore in winter and early spring,” so city officials expect the noise to continue until April. The fish make the sound with their air bladder, researchers say.

Punta Gorda, 100 miles south of Tampa, is strategically located for black drum at the junction of the Peace River and Charlotte Harbor. Its neighborhoods are also laced with canals, where drum can escape predators such as sharks.

Residents report they have been feeling the sound as well as hearing it.

“I have wood floors and it vibrates like someone is walking,” Mary Ann Walton wrote on the city’s Facebook page.

“I have to keep moving my pillow because it sounds like a heartbeat!” Pattie Brophy posted.

“I thought a ghost or someone/thing was under my bed first time I heard it!” Donna Pearson Lee said.

“I was so happy when someone explained the sounds to me. I was making myself crazy listening to the appliances and everything else in my house,” Debbie Ford said.

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