Data for: Patrolling the border: billfish exploit the hypoxic boundary created by the world's largest oxygen minimum zone

Pelagic predators must contend with low prey densities that are irregularly distributed and dynamic in space and time. Based on satellite imagery and telemetry data, many pelagic predators will concentrate horizontal movements on ephemeral surface fronts—gradients between water masses—because of enhanced local productivity and increased forage fish densities.
Vertical fronts (e.g., thermoclines, oxyclines) can be spatially and temporally persistent and aggregate lower trophic level and diel vertically migrating organisms due to sharp changes in water density or available oxygen. Thus, vertical fronts represent a stable and potentially energy-rich habitat feature for diving pelagic predators but remain little explored in their capacity to enhance foraging opportunities.
Here, we use a novel suite of high-resolution biologging data, including in situ derived oxygen saturation and video, to document how two top predators in the pelagic ecosystem exploit the vertical fronts created by the ..., ,