Ocean Facts for Kids
Deep-sea facts and ocean wonders
Coral looks like a plant or a rock, but it is actually an animal. Tiny creatures called polyps build hard skeletons that stack up over thousands of years to make coral reefs.
Many deep-sea creatures make their own light through a process called bioluminescence. About 76% of ocean animals are bioluminescent — they can glow in the dark waters of the deep sea.
The ocean absorbs about 30% of the carbon dioxide produced by humans. This helps slow climate change but makes the ocean more acidic, which is harmful to shell-forming creatures.
Ocean currents form a giant 'conveyor belt' that circulates water around the entire planet. It takes roughly 1,000 years for a drop of water to complete one full journey around the world.
The deep-sea anglerfish dangles a bioluminescent lure above its head to attract prey in the pitch-black depths. The light is produced by bacteria living inside the lure.
Sperm whales can dive deeper than 2 kilometers and hold their breath for up to 90 minutes. They hunt giant squid in the pitch-dark deep ocean using echolocation.
Hydrothermal vents are like underwater geysers on the ocean floor that spew superheated water reaching 400°C. Strange creatures like tube worms and blind shrimp thrive around them with no sunlight at all.
Sharks have existed for about 450 million years — that means sharks are older than trees. They survived all five of Earth's mass extinctions.
The ocean produces more than half of Earth's oxygen — mostly through tiny photosynthetic organisms called phytoplankton. Every second breath you take comes from the sea.
Manta rays have the largest brain-to-body ratio of any fish. They have been observed appearing to recognise themselves in mirrors, a sign of self-awareness rare in the animal kingdom.