Ever wanted to know what the ocean is talking about? Grab your headphones and get ready to dive deep—Simply Science is tuning into the underwater world with hydrophones! In this episode, we’re uncovering the hidden lives of marine creatures and exploring how scientists use these underwater microphones to “eavesdrop” on everything from whale love songs to territorial fishy arguments.

We’ll start with the basics: how do hydrophones work? Capturing the soft clicks of dolphins and the low rumbles of deep-sea giants isn’t easy, but these clever devices are up to the task. Once you understand how they work, we’ll dive into the ocean’s soundscapes, where you’ll hear some unexpected underwater voices, from snapping shrimp to the haunting calls of whales.