Why Are Some Lakes Pink?

Imagine you are flying in an airplane. You look down at the earth. You see green forests, blue oceans, and grey mountains. Suddenly, you see a bright pink lake! It looks like a giant bowl of strawberry milk. This is not a dream. There are real pink lakes in different parts of our world.

One famous pink lake is Lake Hillier in Australia. It is next to the blue ocean, so the contrast is beautiful. Another famous one is Las Coloradas in Mexico. There are also pink lakes in Spain, Senegal, and Canada. Why are these lakes pink? The answer is not paint or chemicals. The answer is nature.

The Secret of Salt

First, these lakes are very, very salty. They have much more salt than the ocean. Most fish and plants cannot live in such salty water. It is too difficult for them to survive. But some special, tiny living things love this salty environment.

Tiny Living Things

The main reason for the pink color is a tiny plant called Dunaliella salina. This is a type of algae. It is so small that you cannot see it with your eyes. You need a microscope to see just one. This algae loves salt and warm sun.

To protect itself from the hot sun, the algae makes a red pigment. A pigment is a natural color. It is similar to the orange color that we see in carrots. When millions of these tiny algae grow together in the salty water, the lake looks bright pink.

There are also tiny microbes called halobacteria in the water. They are not dangerous to humans. These microbes also have a red or pink color. Together, the algae and the microbes paint the water pink.

Is It Safe?

Can you swim in a pink lake? Yes, in most of them, it is safe to swim. Because the water has so much salt, you can float very easily. You do not need to try to stay on top of the water. It feels like floating in the Dead Sea. However, you must never drink the water. It is too salty and will make you sick. Also, you should protect your eyes because the salt can burn them.

Some pink lakes change color during the year. In the winter, when it rains, the water becomes less salty. The tiny plants sleep, and the lake looks blue or grey. In the summer, the sun is hot, the water evaporates, and the salt level goes up. Then, the lake becomes bright pink again.

Nature has many beautiful secrets. Pink lakes are a wonderful example of how tiny living things can change the world around them.

Would you like to swim in a pink lake?