Ocean Facts for Kids
Deep-sea facts and ocean wonders
The ocean covers about 71% of Earth's surface, making our planet look blue from space. Despite being so vast, humans have explored less than 20% of it.
Earth has five named oceans: the Pacific, Atlantic, Indian, Arctic, and Southern. The Pacific Ocean alone is larger than all of Earth's land combined.
Seawater is salty because rivers carry tiny amounts of salt from rocks and soil into the ocean. Over millions of years, all that salt has built up.
Most ocean waves are made by wind blowing across the water's surface. The harder the wind blows, the bigger the waves get.
Clownfish live inside sea anemones, which have stinging tentacles that would hurt most fish. A special slime coating protects clownfish from the stings.
Female sea turtles travel thousands of miles across the ocean and then return to the exact same beach where they were born to lay their own eggs.
In seahorses, it is the father — not the mother — who carries the babies. The male has a special pouch where up to 2,000 tiny seahorses can grow.
Australia's Great Barrier Reef is the world's largest coral reef system and is so big it can be seen from space. It stretches over 2,300 kilometers.
Jellyfish are about 95% water, which is why they look almost transparent. They have no brain, no heart, and no bones — yet they have survived for over 500 million years.
Wild penguins only live in the Southern Hemisphere. They use their wings as flippers to 'fly' underwater, reaching speeds of up to 25 km/h.