Pacific Northwest diver and REEF surveyor, Nick Brown, recently discovered the invasive tunicate, Ciona savignyi, during a dive in the San Juan Islands in Washington. This was the first record of the unwanted species in the San Juans. Nick learned about the invasive tunicate, and two other species that are monitored by REEF surveyors in the Pacific Northwest, during a recent REEF training seminar taught by Janna Nichols. Volunteer divers are serving an important role in the early detection and removal of invasive tunicates in the Pacific Northwest.