PBS
Pbs Learning Media: Earth a New Wild: Sharks & Shorelines
In this video, students learn about lemon sharks and how their grazing habits help keep mangrove ecosystems healthy. [3:57]
NOAA
Noaa: Estuary Education: So What Is an Estuary, So Now You Know
Produced by the Association of National Estuary Programs as a fun explanation of what estuaries are and why they are important. [7:23]