Plastic ingestion causes chronic welfare harm to sea turtles and is a leading threat to their health globally.
Plastic ingestion creates a progressive welfare deterioration for sea turtles who consume it. A small amount of plastic causes relatively minor harm; accumulation leads to gut impaction, inability to dive properly due to gas trapped in the digestive tract, reduced feeding ability, and nutritional deficiencies as plastic fills space that should hold food. The suffering from chronic buoyancy syndrome — where turtles cannot dive to feed or escape predators — is prolonged and debilitating. Stranded turtles presenting with plastic ingestion represent the endpoint of a welfare decline that began with a single piece of plastic. Ocean plastic reduction is the fundamental intervention.