Ocean Facts for Kids
Deep-sea facts and ocean wonders
The vampire squid lives in the ocean's oxygen minimum zone, where almost no other animal can survive. Despite its scary name, it feeds on tiny bits of sinking organic matter called 'marine snow'.
Sea cucumbers can change the stiffness of their body on demand. They can become almost liquid to squeeze through tiny gaps and then firm up again on the other side.
As the ocean absorbs more carbon dioxide from the atmosphere, it becomes more acidic. This ocean acidification makes it harder for shellfish, corals, and other marine organisms to build their calcium carbonate shells and skeletons.
Cleaner wrasse are tiny fish that set up 'cleaning stations' on reefs. Larger fish queue up and open their mouths so the wrasse can pick off parasites — like an underwater dentist!
The Mariana snailfish is the deepest-living fish ever discovered, found at about 8,000 metres below the surface. Its body is see-through and has no scales.
Rock pools along the coast are like tiny worlds. They hold starfish, crabs, anemones, and small fish that all have to survive crashing waves and changing temperatures every day.
When a whale dies and sinks to the ocean floor — an event called a 'whale fall' — its body can feed an entire community of deep-sea organisms for up to 50 years.
Indo-Pacific lionfish have become a major invasive species in the Atlantic Ocean. A single female can release up to two million eggs per year, and they have very few natural predators in their new environment.
Sea angels are tiny, see-through creatures that look like little fairies swimming through the water. They are actually a type of sea snail that has lost its shell!
The deepest ocean trenches form at subduction zones, where one tectonic plate slides beneath another. The immense pressure and geological activity at these boundaries also triggers earthquakes and volcanic eruptions.