CHICAGO — In late October, a young sea otter pup was found in the remote coastal town of Seldovia, Alaska, stranded and calling out in distress with no mother in sight. After being rehabilitated, fed and healed, the tiny otter — barely over a month old — began a cross-country trip to his new home in Chicago. After being rescued by the Alaska SeaLife Center, the 10-pound male northern sea otter received a warm welcome at Shedd Aquarium in late November. He has remained behind the scenes at the aquarium, where animal care and veterinary staff are monitoring and caring for him around the clock. T…