Harbor porpoises, which had been eliminated for many decades from portions of Puget Sound, are making a big comeback.
Researchers think one of the reasons is the ongoing cleanup of industrial waste flowing into the water.
Aileen Jeffries, a research scientist with Pacific Biodiversity Institute who has pioneered the use of passive acoustic monitors for studying the porpoise, is leading a team of volunteers and biologists to learn more about the playful creatures.
(READ the AP story from Beaumont Enterprise)