The likely source of a strange hum that has been disturbing residents of Hythe, near Southampton, England, has been identified: horny fish. The Scottish Association for Marine Science (SAMS) investigated the low-frequency noise and think it may be the sound of male midshipman fish eager to mate in a nearby estuary. “It’s not beyond the realms of possibility,” SAMS scientist Ben Wilson told The Telegraph. “There are certainly ‘sonic fish’ in the north Atlantic and the approaches to the English Channel.”