Hidden Underwater Symphony: Scientists Decode Fish Sounds Along Columbia's Coast

Scientists from the University of Victoria have uncovered a hidden world of underwater noise along Columbia's coast. Using underwater microphones, they recorded unique sounds from eight fish species—some never documented before. The findings could change how researchers track and protect marine life in the region.

The team deployed specialised equipment to capture a range of fish noises, from grunts and growls to knocks and croaks. Among the newly recorded species were black, quillback, copper, canary, and vermillion rockfish. These sounds often signal behaviours like hunting or avoiding predators, particularly in species such as the copper rockfish.

A machine learning model was then developed to distinguish between the distinct acoustic patterns of each species. This technology forms the basis for a planned 'fish sound detector,' designed to identify and monitor fish populations without the need for physical capture.

Beyond species identification, the researchers are exploring whether fish in different parts of Columbia produce regional 'accents' or variations in their calls. Such differences could provide deeper insights into population movements and environmental adaptations.

The study opens new possibilities for conservation and fisheries management along the Columbia coast. By analysing fish sounds, scientists can gather critical data on population health and behaviour without disrupting marine ecosystems. The next phase involves expanding the research to other regions, potentially transforming how fish populations are studied and protected.