Overfishing
- What does overfishing mean, and why is it a problem?
- What happens when too many fish are taken from the ocean?
- Why do people catch more fish than they need?
- How does overfishing affect other sea creatures?
- What can people do to stop overfishing?
Overfishing happens when people catch too many fish, faster than they can reproduce. This is a problem because fish numbers go down, and the ocean’s food chain is disrupted.
Fish populations shrink, making it harder for predators like sharks and dolphins to find food. It can also affect people who rely on fishing for food and jobs.
Some fishing companies want to make more money, and some countries depend on fish as a main food source. Also, better technology makes it easier to catch large amounts of fish.
When one type of fish disappears, it affects the entire food web. Some animals lose their food source, while others might take over, causing an imbalance in the ecosystem.
People can fish in a more sustainable way by catching fewer fish and protecting young ones. Governments can create fishing limits, and consumers can choose to eat fish from sustainable sources.
Climate Change
- How does climate change make the ocean warmer?
- What happens to sea animals when the ocean gets too hot?
- How does climate change cause stronger storms and bigger waves?
- Why are the ice caps melting, and how does that affect the ocean?
- What can we do to slow down climate change and protect the ocean?
Burning fossil fuels like coal and oil releases gases into the air. These gases trap heat, making the Earth's temperature rise, including the ocean’s temperature.
Many sea animals, like fish and turtles, struggle to survive in warmer water. Some move to cooler areas, but others can’t escape and may die.
Warmer ocean water gives storms more energy, making them stronger. This can lead to more hurricanes and bigger waves that damage coastal areas.
Rising temperatures cause the ice at the North and South Poles to melt. This adds more water to the ocean, causing sea levels to rise and flooding coastal areas.
We can use less fossil fuel by walking, cycling, or using clean energy. We can also plant trees, reduce waste, and protect natural habitats.
Coral Bleaching
- What are coral reefs, and why are they important?
- Why do corals lose their colour and turn white?
- How does coral bleaching affect fish and other sea creatures?
- What causes coral reefs to become sick or die?
- How can people help protect coral reefs?
Coral reefs are underwater structures made by tiny animals called corals. They provide food and shelter for many sea creatures and protect coastlines from big waves.
When the ocean gets too warm, corals become stressed and push out the algae that give them colour and food. This turns them white, a process called coral bleaching.
Corals provide food and shelter for many sea animals. When corals die, fish and other creatures lose their homes and may also die or move away.
Coral reefs are harmed by warmer water, pollution, overfishing, and people touching or breaking them.
People can avoid touching corals, stop polluting the ocean, and help slow down climate change. Some areas also create marine parks to protect reefs from damage.
Plastic Pollution
- How does plastic end up in the ocean?
- What happens to sea animals when they eat plastic?
- Why is plastic pollution dangerous for the ocean?
- How long does it take for plastic to break down in the ocean?
- What can we do to stop plastic pollution?
People throw away plastic, and it gets carried by wind and rivers into the ocean. Some plastic is also dumped straight into the sea.
Animals like turtles, fish, and seabirds mistake plastic for food. It can make them sick, get stuck in their stomachs, or even cause them to die.
Plastic takes hundreds of years to break down, harming marine life and spreading toxic chemicals in the water.
Some plastics take hundreds or even thousands of years to break down, and even then, they turn into tiny harmful particles called microplastics.
We can use less plastic, recycle, clean up beaches, and support bans on single-use plastics like straws and plastic bags.