Underwater coral reefs are teeming with life, from tiny shrimp to large fish, each contributing to the vibrant soundscape. Ecologists have long relied on underwater microphones to monitor these environments, but interpreting the sounds has been a challenge due to the vast diversity of species. A groundbreaking tool, the FishEye Collaborative's Omnidirectional Underwater Passive Acoustic Camera (UPAC-360), is revolutionizing this field. This innovative device combines underwater sound recordings with a 360-degree camera, allowing researchers to pinpoint the sounds made by individual fish. The collaboration between bioacoustic researchers at Cornell Lab of Ornithology and Aalto University has already identified 46 fish species from the coral reefs of Curaçao in the Caribbean, revealing that over half of these species were previously unknown for producing sound. The findings, published in the journal Methods in Ecology and Evolution, showcase the immense biodiversity of fish sounds, akin to the variety of bird songs in a rainforest. With an estimated 700 fish species producing sounds in the Caribbean alone, the challenge of identification becomes evident. The UPAC-360's Spatial Audio technology enables researchers to visualize and correlate sound with the 360-degree image, creating a video that reveals the source of each sound. This extensive collection of fish sounds is now accessible to everyone through the FishEye Collaborative's library, offering a valuable resource for scientists and conservationists. The technology is similar to smartphone apps like Merlin Bird ID, but it operates remotely, eliminating the need for divers or boats. The researchers emphasize the potential of these sounds in training machine learning systems to automatically detect fish species in underwater recordings, marking a significant step towards ocean conservation.
