Why Do Oceans Sometimes Turn Blood Red?

The ocean turns blood red when tiny creatures called algae grow a lot. These algae are like the ocean's little painters, they cover everything in red, just like painting a big wall with red paint.

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Examples

A little girl sees a red tide for the first time and thinks it's the ocean bleeding.
The beach is covered with beautiful red water that looks like blood.
Fishermen see a big red tide and know they might not catch any fish that day.

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Categories: Environment · ocean· red tide· marine biology· algae· environmental phenomenon