Fishery bycatch—the accidental entanglement or capture in nets of animals that are not the intended target fish—is a leading cause of injury and death of seals and other marine mammals. Conversely, depredation—the eating of fish from nets by marine predators such as seals—can ruin a commercial fishing catch and cause expensive damage to nets and other fishing gear. For the first time, the team has been able to capture underwater video of gillnet fishing in the Northeast U.S., catching seals, spiny dogfish, and other predators on camera as they approach and enter the nets. To film depredation in action, Bocconcelli and the team attached an array of five underwater cameras across the top or “headrope” of a gillnet. The team has collected close to 100 hours of video footage, which is still being analyzed.