Marine mammals—a group that includes whales, dolphins, porpoises, seals, sea lions, walruses, sea otters, polar bears, dugongs, and manatees—face challenges as wide-ranging as the oceans. From capture for public display to water and noise pollution, humans are the source of many of those challenges. But whether they are at risk from the unnatural conditions of captivity or from human-caused injury or death in the wild as a result of hunting, interactions with fisheries, or habitat degradation, marine mammals have a strong ally in The Humane Society of the United States. We are dedicated to protecting marine mammals and their habitats. Find out more about the issues involved in marine mammal protection and what you can do to help.