On her dive days as a marine biologist for The Bay Foundation, Ariadne Reynolds is usually scuba diving in the Santa Monica Bay for three 1-1.5 hour stretches as she observes urchins and kelp growth, and measures every detail of the site’s ecosystem.

On this dive, captured by Mashable, Reynolds’ focus is on restoring the native kelp forests, which have been reduced in part by an overpopulation of sea urchins. Kelp forests are beneficial to the local environment by calming the waves, reducing shore erosion, and providing productive habitats for a diverse mix of marine life.

Watch When Your Job Is Saving The Ocean, a video from Mashable’s How She Works series about women and their jobs.

Next: Searching for Life in Iceland’s Frigid Fissures, Preserving the Forest of the Sea, and Two weeks under the sea at Aquarius Reef Base.

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