Although they get little attention, seagrasses are a vital part of the marine ecosystem and home to a diverse range of organisms. But seagrasses are in trouble: it’s estimated that 29% of the world’s seagrass meadows have died off in the past century, with 1.5% more disappearing each year. We get a Seagrass 101 crash course from Dr. Jillian Ooi, a marine biologist and Senior Lecturer from the Department of Geography, Faculty of Arts and Social Sciences, Universiti Malaya.