Most of the ocean is visually inaccessible to humans. The ocean is also impenetrable to many communication and geolocation technologies, such as radio waves, GPS, and other forms of electromagnetic radiation. Sound travels effectively through seawater—a feature known to marine mammals, which have evolved to use sound to communicate, find food, and navigate underwater. Oceanographers have also taken advantage of sound’s ability to propagate through seawater, using underwater acoustic technologies to greatly advance our understanding of the ocean and marine ecosystems. But using sound to “see” into a noisy ocean has its challenges, and it can be difficult to distinguish individual acoustic signatures amidst the cacophony of the underwater soundscape.