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Two bluefin species, a yellowfin, and an albacore are no longer critically endangered or have moved off the leading international list of endangered species entirely. The unexpectedly fast recovery speaks to the success of efforts over the past decade to end overfishing. But tuna are not the only species scientists are deliberating at the 2021 World Conservation Congress in Marseille, France, which is organized by the International Union for Conservation of Nature (IUCN).
