In Southeast Alaska, sea otters have made a critical comeback after their populations were decimated during the fur trade. With their numbers growing, how are these charismatic critters impacting the ecosystem? Learn about the critical role this species plays in maintaining the health of seagrass habitat and what Earthwatch researchers and volunteers have uncovered so far. (The music in this episode is "Partly Sage" by Blue Dot Sessions, provided under the Attribution-Noncommercial License.)