What are sponges?

Sponges are like squishy underwater pillows that help clean water by eating tiny bits of food.

Imagine you have a big bowl of soup, and you want to get all the little pieces of noodles out, you might use a strainer. That’s kind of what sponges do in the ocean! They live on the seafloor or attach themselves to rocks, and they let water flow through them. As the water goes in, it brings tiny plankton, like the noodles in your soup.

Inside the sponge, there are little cells that grab these plankton and eat them. It’s like having a team of tiny workers who clean up the water while also getting a snack!

Some sponges even have tiny hairs called choanocytes, which help sweep the food into the sponge's body. These hairs move like little brooms, making it easier for the sponge to eat.

Sponges might look simple, but they’re very clever, just like how you can use a strainer without thinking about it!