NOAA estimates that over 300,000 cetaceans die annually from entanglement in fishing gear worldwide. Loggerhead and leatherhead sea turtles, Hawaiian monk seals, North Atlantic right whales, and humpback whales face particularly high entanglement mortality. Ghost gear (abandoned, lost, or discarded fishing gear) accounts for a significant proportion of entanglement events.
Entangled animals face prolonged suffering: rope and netting cuts through skin and blubber over weeks to months, causing infected wounds, restricted feeding ability, drowning risk, and exhaustion. North Atlantic right whales that survive initial entanglement often carry gear for months before death from rope-induced injuries to mouth, flippers, and body.
Large whale disentanglement is a specialized, hazardous operation requiring trained teams with cutting tools deployed from small boats. The Center for Coastal Studies, NOAA, and international partners train disentanglement response networks globally. Success rates depend on entanglement severity — fresh, accessible entanglements can be resolved; deep, chronic entanglements are often fatal.
Ropeless (on-demand) fishing gear — using acoustic release systems to bring gear to the surface without vertical lines — eliminates the primary entanglement hazard for large whales. Weak links in gear allow animals to break free. Sinking groundlines reduce entanglement risk for sea turtles. These modifications are increasingly required in high-risk fisheries.
The Global Ghost Gear Initiative (GGGI) coordinates gear removal programs and promotes responsible fishing gear management. Ghost gear retrieval expeditions remove tonnes of fishing gear from oceans and reefs annually. Extended producer responsibility for fishing gear and gear marking programs help identify gear ownership and reduce deliberate abandonment.
The US Endangered Species Act and Marine Mammal Protection Act create legal obligations to reduce entanglement for protected species. The EU shark finning regulation and Mediterranean gillnet restrictions address specific entanglement risks. International Maritime Organization (IMO) guidelines on ghost gear are being strengthened.