Bluefin tuna have been widely accepted as being severely overfished, with some stocks at risk of collapse. According to the International Seafood Sustainability Foundation (a global, nonprofit partnership between the tuna industry, scientists, and the World Wide Fund for Nature), Indian Ocean yellowfin tuna, Pacific Ocean (eastern and western) bigeye tuna, and North Atlantic albacore tuna are all overfished. In April 2009, no stock of skipjack tuna (which makes up roughly 60% of all tuna fished worldwide) was considered to be overfished.