The importance of keeping sharks, and our oceans, healthy is explored in this clever video about what would happen to animals across the entire planet if sharks disappeared.

Teaches children and their parents about fish from around the world.

" ... In Marine ecosystems, students will explore saltwater environments -- from shorelines to coral reefs -- and learn about the fish, plants, mammals, and insects that depend on each other for survival in this aquatic biome. Examine concepts such as salinity and currents, and find out about the three major life zones found in ocean waters. A fun, hands-on experiment allows students to discover how brine shrimp have adapted to changes in salt concentration,...

"Young viewers will explore freshwater ecosystems such as ponds and rivers, as well as marine ecosystems like coral reefs and the open ocean. They will learn that the animal and plant life found in water ecosystems make up communities that are as complex as they are beautiful. A hands-on experiment demonstrates what happens when pollutants get into ponds and lakes, while a visit with a marine biologist examines the oyster population of the Chesapeake...