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 into the ocean

Take a deep breathe in. Some of oxygen that is filling your lungs has come from the ocean! The ocean is a vital to life on Earth.

Today there are five oceans that cover just over 70% of our planet.

  • the Atlantic Ocean

  • the Pacific Ocean

  • the Indian Ocean

  • the Southern Ocean

  • the Arctic Ocean

Worldmap-oceans_World map - oceans_World map - oceans.jpg


Complete the five oceans activity sheet

Ocean Currents

Diving into the depths

The world’s oceans include warm waters and icebergs, shallow reefs and deep dark trenches. Different type of sea life like different kinds of ocean. Scientists have organised the ocean into layers. Each layer is usually distinguished by the amount of sunlight it receives.

These five layers are

  • The Sunlight Zone

  • Twilight Zone

  • Midnight Zone

  • Abyssal Zone

  • Trench Zone

oceanzones_Ocean zones .jpg


Have a go at the match the species to the ocean zone game!


© elasmo holdings pty ltd

© elasmo holdings pty ltd

Coral reefs are like busy underwater cities, home to thousands of fish and other animals. The biggest coral reef in the world is the Great Barrier Reef which is here in Australia! It is 20,000 years old and is so large it can be seen from space.

Coral reefs only cover 1% of the ocean but amazingly 25% of all sea creatures live on or very near a reef!

Coral is very sensitive to dirty water and changes in temperature. Coral reefs are one of the most endangered habitats in the world.

Some cool ocean Species

Threats to our ocean

Some of the threats the ocean is currently facing are;

Climate Change

Increased Carbon emission is causing the temperature and pH balance of the Ocean to shift. Higher temperatures in the Ocean have devastating effects on marine life such as coral bleaching, migration patterns of fish and the loss of habitat for polar species like penguins, polar bears and seals. Melting ice caps increase combined with warmer waters is causing rising sea levels.

Ocean Acidification

Ocean acidification affects whole ecosystems, such as coral reefs, which depend on the formation of calcium carbonate to build reef structure, which in turn provides homes for reef organisms.

Chemical Pollution

Eighty percent of pollution to the marine environment comes from the land. One of the biggest sources is called non-point source pollution, which occurs as a result of runoff. Non-point source pollution includes many small sources, like septic tanks, cars, trucks, and boats, plus larger sources, such as farms, ranches, and forest areas. Millions of motor vehicle engines drop small amounts of oil each day onto roads and parking lots. Much of this, too, makes its way to the sea.

Plastic Pollution

Currently, it is estimated that by 2020 there will be more plastic in the ocean than fish. The very traits that made plastic revolutionary are also the reason it has become one of the greatest threats to life on Earth.

Noise Pollution

Underwater acoustical communication networks, military sonar, seismic airgun surveys, seafloor oil and gas processing, and shipping noise are having a profound effect on Marine life, such as whales and dolphins rely on sound to navigate their world.

Over Fishing

Fishing is one of the most significant drivers of declines in ocean wildlife populations. Catching fish is not inherently bad for the ocean, except for when vessels catch fish faster than stocks can replenish.


Wherever there is fishing, there is by-catch—the incidental capture of non-target species such as dolphins, marine turtles and seabirds. Thousands of miles of nets and lines are set in the world's oceans each day.

Habitat destruction


Lets explore the effects of an oil spill in the ocean


There is 7.7 billion people on Earth, but there is only 1 you.

You DON’T need super powers to save the planet. The little choices that we make every single day really do have such a large impact.

You are the new philosophers, the change drivers, the discoverers, the scientists, researchers, artists, influencers. Humans have this incredible ability to love, to feel compassion and empathy and, never forget the power of imagination!

There is a vast ocean of possibilities and you are a new wave.