FUKUOKA--Only three sea otters remain at aquariums in Japan, and they are now treated like rock stars because of their advancing years. Japan was once home to dozens of the cute mammals.
Sea otters are a keystone species, meaning they help to balance the ecosystems they inhabit ... In turn, the sea urchins who would normally hide in rock crevices and feed on the nearby kelp, had less ...
What happens if an otter pup gets separated from its mother? In some aquariums, otter surrogacy programs are finding success.
Sea otters in California are helping to protect kelp forests from an invasion of purple sea urchins. NBC News' Gadi Schwartz ...