Animated GIF showing an illustration of zooplankton layers moving up and down the water column over a mesophotic reef

Animated GIF showing an illustration of zooplankton layers moving up and down the water column over a mesophotic reef. These "sound scattering layers" of zooplankton were recorded as part of the study Complex sound scattering layer and water-column dynamics over a mesophotic coral ecosystem: Southwest Puerto Rico, U.S.A.