Bigeye tuna primarily feed on epipelagic and mesopelagic fish, crustaceans and cephalopods. Bigeye tuna are an epipelagic/mesopelagic species that eats other fish. The forage fish are, in turn, eaten by larger fish, such as the bigeye trevally. Bigeye tuna are an epipelagic/mesopelagic species that is carnivorus, eating other fish. Globally, approximately 450,500 metric tonnes of bigeye tuna were caught by commercial vessels in 2012. Their prey also includes squid and crustaceans, as well as sardines and bigeye scad. The bigeye thresher shark is rarely encountered by divers underwater and poses no danger. Bigeye threshers are likely preyed upon by larger sharks and marine mammals. In 2010, Greenpeace International added bigeye tuna to its seafood red list. An operation targeting bigeye tuna recently received final approval. The bigeye sand tiger feeds on bony fishes and squid. The bigeye thresher has a virtually circumtropical distribution. Bigeye threshers are ovoviviparous, usually bearing litters of two pups. It is said that the bigeye thresher uses its long tail to smack down birds. The large eyes of the bigeye thresher are adapted for hunting in low light conditions.