Subscribe Now! National Geographic Magazine $15
Visit our Online Shops

Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Australian Seashore, Kalbarri

Photo: Surf crashes on Kalbarri seashore, Australia
Waves at high tide crash on shore near Kalbarri National Park in Western Australia. Ocean tides are created by the gravitational effects of the moon and sun on the Earth. When the moon is full or new, attraction is high, and the oceans bulge outward, creating spring tides.
Photograph by Bill Ellzey

Habitats Topics

SPECIAL ADVERTISING SECTION

Photo: Glass of water

Take Quiz

Test your water knowledge.

Photo: 2009 Winner

Photo Contest

Find out who takes home the Grand Prize!

For Kids! Creature Features

Image: Creature Features logo

Click to learn more about animals and their habitats.

Lesson Plan: Using Ocean Maps

Image: Xpeditions logo

Find a variety of geography lesson plans and activities for all age groups.