Marine ecosystem

A marine ecosystem is like a big community of different living things that live in the ocean, kind of like how people live in a town or a city.

Just like in a community, there are different types of living things in a marine ecosystem, such as plants, animals, and tiny organisms like plankton.

Different types of living things in a marine ecosystem depend on each other for food and shelter, like how people might rely on a grocery store or a library.

For example, small fish might eat plankton, and then bigger fish might eat those smaller fish, and then even bigger predators like sharks might eat those bigger fish.

Plants in the ocean, like seaweed or kelp, can also provide a home for lots of different types of animals, like crabs or sea urchins.

Just like in a community, if something happens to one part of the ecosystem, it can affect the other parts. For example, if there's pollution in the ocean, it can harm the plants and animals that live there.

Overall, a marine ecosystem is a big, complex system of different living things that rely on each other to survive in the ocean!