Deep Listening: Exploring the Depths of the Adriatic.
The Adriatic Sea hosts a complex underwater soundscape shaped by biological, natural and anthropogenic sources. Increasing human-generated noise poses a growing threat to marine organisms that rely on sound for communication, orientation and survival, making bioacoustics a key tool for ecosystem assessment and conservation. This article outlines over two decades of marine bioacoustic research in the Adriatic, focusing on the Interreg Italy–Croatia projects SOUNDSCAPE and UNDERSEA. Using long-term passive acoustic monitoring, these initiatives document marine biodiversity, assess underwater noise and support the creation of a reference library of cetacean vocalisations, providing essential data for research, management and conservation.