nets, specifically aimed at catching redfish or grenadiers. These nets, equipped with heavy metal "doors" to keep the net open, and a "footline" fitted with large metal "rollers," are dragged across the seabed, inflicting severe damage on coral. Given the slow growth rate of coral, this practice is unlikely to be sustainable in the long term.

Scientists estimate that trawling has damaged or destroyed 30%-50% of the Norwegian shelf