A crew member prepares longlines on board the Taiwanese fishing vessel Kai Jie 1. Greenpeace is calling for the closure of pockets of international waters in the Pacific to all types of fishing in order to rescue tuna from depletion of stocks. Longliners mainly target bigeye, yellowfin and albacore tuna, destined for sashimi markets in Japan and other countries where this food has become popular. Scientists have warned that some Pacific tuna stocks, such as bigeye and yellowfin tuna, are being fished beyond their limits. In addition, approximately 35% of longline catch consists of non-target species, including threatened oceanic sharks, and turtles.