"It's a gift, it’s probably the best thing I've done" says Dan Calderon, a biologist reintroducing Atlantic sturgeon into Swedish waters, a dream he's had since he was eleven years old. Along with Linnéa Järgrud from the Swedish Anglers Association, he is helping reintroduce 100 young sturgeon, translocated from a breeding facility in Germany, into the Göta river, north of Gothenburg. The species is considered endangered and is even extinct in many of its original habitats, mainly due to overfishing and deteriorating water quality. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES