For two million years, the world's largest sea lions have survived along Alaska's rocky coastline, but now the population is declining at an alarming rate.

Wild Chronicles joins a team of scientists using Crittercam® to investigate theories about the Steller sea lions' mysterious disappearance, and uncover clues that could save the species.

  1. Why does Richard, a biologist, call the declining population of Steller sea lions "a great mystery"?

  2. Don, another biologist, studies the health of Steller sea lions. What does he find?

  3. What is the primary food source for Steller sea lions?

  4. What other predator hunts this food source?

  5. Competition for food may contribute tothe declining population of Steller sea lions. What may be other contributing factors?


edge of land along the sea or other large body of water.


camera designed to be worn on a wild animal, providing a "critter-eye view" of the animal's environment.


to reduce or go down in number.


total number of people or organisms in a particular area.

sea lion

marine mammal.