While algal blooms that turn water red may look cool, they pose a risk to humans and the shellfishing industry at Cape Cod National Seashore in Massachusetts.

The latest video in the “Outside Science (inside parks)” series focuses on the research being done on red tides by graduate student Alexis Fischer of the Woods Hole Oceanographic Institution. She studies at an estuary in the Seashore and says the New England area has been affected by red tides most of the past 30 years.

Every month in 2016, the “Outside Science (inside parks)” video series will showcase ways “the next generation is getting involved in park science.” This is the third episode released by the National Park Service and produced by students from Colorado State University. The first two videos chronicled a BioBlitz at Hawai‘i Volcanoes National Park and collecting dragonflies to study mercury levels at Great Sand Dunes National Park and Rocky Mountain National Park, both in Colorado.