At first glance, it looks like an idyllic scenario: blue sea, golden sand and a white foam line to get around the sea. But this foam we see on the beaches is not always only the result of the natural movement of waves. In some cases, it may be a visible alert of pollution or even a direct risk to the health of bathers.
According to the Leak website, the natural foam is formed when the agitation of the wave mixes decaying organic particles such as algae, plankton and marine plant remains. This phenomenon is common and most often harmless.
However, there are situations where the origin is quite different, resulting from chemical pollutants, industrial waste or even household detergents that reach the sea through rivers.
Not all foam is a sign of an intact nature
These substances, when contacting water, reduce surface tension and allow bubbles to form and stay longer. The result is a dense, persistent foam and often with strange colors or odors.
According to the same source, this change in appearance may indicate the presence of contaminants that pose a risk to the marine ecosystem and for people.
When the foam hides toxins
One of the most worrying scenarios is associated with the so -called “red tides”, a phenomenon caused by the flowering of harmful algae. Despite the name, water does not always turn red, can have green, brown or gold tones.
These algae release toxins that kill fish, affect other marine organisms, and can cause allergic reactions or breathing problems in swimmers. The consumption of seafood contaminated by these toxins is particularly dangerous and can lead to serious poisoning.
How to identify dangerous foam
It is not always easy to distinguish the harmless foam from that it represents danger. Still, there are signs that should raise suspicions: intense and unpleasant smell, similar to detergent or sewage; abnormal color; sticky or oily texture; Presence of waste or trash stuck in the foam.
The risk increases in summer
According to the probability of finding contaminated foam increases in the hot months, due to the flowering of algae and the largest coastal pollution caused by tourism and maritime activity. Strong rains can also drag urban and agricultural pollutants into the sea.
What to find suspicious foam
The recommendation is simple: avoid direct contact, inform the maritime authorities or the City Council and check if there is signaling that prohibits the baths. In case of accidental contact, you should wash with clean water and seek medical assistance if symptoms arise.
Not all sea foam is dangerous, but when it has strange signs it is better not to risk. On the beach, as in life, there are details that make a difference.
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