Recently river otters—hit hard by excessive trapping, habitat destruction, pesticides, and pollutants over the past century—have been reintroduced into watersheds where they had disappeared. The water is cleaner now, and the otters are thriving. But the return of otters to their original range has not been problem-free. Some anglers fear that the otters will have a negative effect on such popular sport fish as trout, although studies have shown that otters tend to take slower-swimming and more abundant non-game fish. Though otters have occasionally raided fish hatcheries and rearing areas, they may also help fisheries in the wild by removing fish that prey on fishery-raised game fish. Can a reintroduction program be too successful? If so, what should we do about it? Due to the immediate nature of this medium, National Geographic Online does not review, censor, approve, edit, or endorse information placed on this forum. Discussion boards on National Geographic Online are intended to be appropriate for family members of all ages. Posting of indecent material is strictly prohibited. The placement of advertisements or solicitations is also prohibited. National Geographic Online shall review information placed on this forum from time to time and delete inappropriate material that comes to its attention as soon as it is practicable, but cannot guarantee that such material will not be found on the forum. By posting material on this discussion board you agree to adhere to this policy prohibiting indecent, offensive, or advertising material, and to legally assume full and sole responsibility for your posting.