Acoustic Sensing Cube in the Ocean Twilight Zone

An ocean network from Woods Hole Oceanographic Institution will give scientists a comprehensive view of the twilight zone, or mesopelagic, using several different technologies including moored buoys equipped with acoustic survey systems; a swarm of optical and geochemical sensors; and new fish-tracking tags that will continuously record the position of major predators such as sharks and tuna. All of these components will connect to the network’s buoys using acoustic signals underwater and an Iridium satellite link at the surface. (Illustration by Natalie Renier, © Woods Hole Oceanographic Institution)