Photo: NatGeo [...This part of Galápagos National Park—a marine sanctuary where absolutely no fishing is allowed—has the greatest abundance of sharks known in the world. It’s this that has made these waters a target of fishermen looking to supply Asian markets with shark fin and shark meat. Worldwide, shark populations are declining, with more than a quarter of sharks and related species considered to be threatened with extinction...] [...It was pure chance that the vessel wa