hydrophones
CORVALLIS, Oregon. – A research team led by NOAA’s Cooperative Institute for Marine Ecosystem and Resource Studies at Oregon State University has developed an automated method that can accurately identify calls from a family of fishes — developed though research in American Samoa waters.
The method...

![Hydrophone deployed in a tropical reef region within the underwater portion of the National Park of American Samoa. Hydrophones are increasingly being deployed in the world’s oceans as they offer advantages over other types of monitoring because they work at night, in low-visibility conditions and over long periods of time. [photo: Tim Clark/National Park Service] Hydrophone deployed in a tropical reef region of American Samoa](https://samoanews.com/sites/default/files/styles/teaser/public/field/image/hydrophone-noaa-osu.jpg?itok=C0naPSUW)