It's not a manipulated photograph! Green capybaras found in Argentina

Cyanobacteria, known for their natural antics, have dyed Lake Salto Grande with a greenish hue that seems straight out of a science fiction movie. These microorganisms, though tiny, can cause a big stir. The proliferation of these bacteria, especially during hot weather, turns the water into a slippery green breeding ground. And while those green capybaras could make a good comic book cover, this phenomenon is far from harmless.

Cyanobacteria are not only masters of camouflage, they are also expert chemists. They can release toxins into the water, which if not handled carefully, can become a health hazard for both animals and humans. And no, it's not the kind of thing you want on your list of "things to try this summer."

How to protect yourself from these aquatic pranksters?

The first rule of the non-green club: avoid direct contact with contaminated water. If you find yourself in an affected area, it's best to stay informed about water quality. The Uruguay River Administrative Commission (CARU) advises closely following local recommendations. And if you encounter cyanobacteria, wash yourself immediately with potable water. Because no one wants to end up with an unpleasant souvenir on their skin.

The World Health Organization (WHO) has already raised the alarm: these bacteria are an emerging problem. Symptoms of exposure are anything but pleasant, ranging from skin irritations to more serious issues like vomiting or muscle weakness. Therefore, prevention is key.

The call to action: fewer nutrients, fewer problems

The increase of nutrients in the water, such as phosphorus and nitrogen, feeds these little green monstrosities. That’s why CARU has urged taking measures to reduce the nutrient load. What’s the goal? Less agricultural and urban waste ending up in our rivers. So, if you ever wondered how you can help, there you have an answer.

In short, although the green capybaras may bring a smile to our faces, the cyanobacteria phenomenon is no joke. With a little awareness and by following the recommendations, we can prevent these mischievous bacteria from getting their way. So, let’s take care and keep those waters crystal clear!