What is phycoerythrin?

Phycoerythrin is a special kind of protein that helps some algae and seaweed catch light to grow.

Imagine you're playing outside on a sunny day, and you wear sunglasses so the bright sunlight doesn’t hurt your eyes. That’s like what phycoerythrin does, it helps algae see light more clearly, especially red and orange light, which makes them happy and healthy.

Think of phycoerythrin as a filter in a water bottle. When sunlight goes through the water, some colors get blocked or changed. Phycoerythrin acts like a color filter that catches the red and orange parts of the light so the algae can use them to make food, just like you might catch raindrops in a bucket.

Some kinds of algae have lots of phycoerythrin, which makes them look bright red or orange, almost like they're wearing a superhero costume! This helps them stand out and get more light than other algae around them.

So next time you see something bright in the ocean or a pond, it might be algae using its special protein, phycoerythrin, to shine on!