From now until April humpback whales will gather off the coast of Hawaii for mating season. In hopes of attracting their counterparts, males will sing their beautiful, eerie songs, with long, complex, repeating melodies that can last for hours on end. Since 2003, Hawaii’s Jupiter Research Foundation has been dropping waterproof microphones 60 feet into the waters off Pukao, Hawaii, recording the songs and broadcasting them via solar-powered buoys.

The Jupiter Foundation’s feed just went live last week, and in addition to a reminder of the strange beauty of some nature’s largest creatures, the songs serve as a great way to mellow out and prepare for the week on this foggy Monday morning.