Sea Turtle Bycatch: Welfare and Conservation Overlap

Sea turtles caught incidentally in commercial fishing gear experience drowning, injuries from hooks and entanglement, and forced ascent causing decompression injuries, representing a major welfare and conservation crisis.

Key Facts

An estimated 250,000 sea turtles are captured as bycatch in US fisheries annually; global numbers are far higher
Longline fishing targeting tuna and swordfish has particularly high sea turtle interaction rates
Loggerhead and leatherback turtles are most frequently caught; all seven sea turtle species are protected under CITES
Turtle Excluder Devices (TEDs) in shrimp trawls have reduced sea turtle mortality by 97% in compliant fisheries
Circle hooks replace J-hooks in longline fisheries, reducing sea turtle hooking rates by 85% with minimal tuna catch reduction
Forced ascent by hauling entangled turtles can cause decompression injuries analogous to divers' bends
Satellite telemetry reveals post-release mortality in apparently healthy turtles, suggesting stress-related delayed mortality

Welfare Considerations

Bycatch welfare impacts on sea turtles range from acute drowning in fixed nets to the chronic stress of exhaustion, entanglement injuries, and hook wounds. Animals that survive initial capture and appear to recover may suffer delayed mortality from internal hemorrhage, infection, or metabolic disturbance. Decompression injuries from rapid forced ascent cause gas bubble formation in tissues that is painful and potentially disabling. Welfare-informed fisheries management combines technological solutions (TEDs, circle hooks) with temporal and spatial closures during periods of peak turtle activity, handling protocols that minimize time out of water, and at-sea de-hooking training for fishing crew.

What You Can Do

Choose seafood from fisheries certified by the Marine Stewardship Council for bycatch management
Support organizations working on sea turtle bycatch reduction including Oceana and the Sea Turtle Conservancy
Advocate for universal adoption of Turtle Excluder Devices in global shrimp fisheries
Participate in beach monitoring programs that track sea turtle nesting in your area
Demand that seafood retailers disclose bycatch data from their supply chains