If you achieve a microphone underwater near the oyster reef in North Carolina's Pamlico Sound,you can hear it: a crisp, crackling noise that sounds like someone just dumped a ton of Rice Krispies into the ocean. But it isn't cereal making that noise - it's thousands of small creatures known as snapping shrimp. Researchers believe that their noisemaking habits could play several key roles within the reef, or including serving as an auditory indicator of the underwater ecosystem's health.
Source: phys.org