Video-Enhanced Lesson

This video-enhanced lesson focuses on symbiosis and ecological relationships. Using sharks and marine species as examples, students will investigate the many ways that species that live in close proximity to each other might interact in an ecosystem, and will then explore the ways that ecosystems can be thrown out of balance, often as a result of human action. (Grades 9-12)

In this lesson students will learn about a complex and often-misunderstood animal, the white shark.

A new age of ocean exploration is lifting the veil of mystery shrouding a creature of legend -- the octopus.

The ocean's 350 species of sharks come in all shapes and sizes -- from gentle 50-foot giants that graze on plants to bizarre-looking bat-faced dwarfs.

NATURE lifts part of the veil of mystery shrouding some fascinating -- and often fearsome -- creatures in "The Secret World of Sharks and Rays."

Discover the remarkable complexity of dolphins' communication, human-like nature, and the controversy surrounding captive dolphins.