During the April 25 holiday weekend, the coastlines of Marche, specifically within the province of Pesaro and Urbino, experienced a surge of visitors drawn by nearly summer temperatures and crystalline, clear waters aided by low tides. While many sought the first sunbathing sessions and swims of the season, they encountered unusual biological phenomena in the Adriatic.
Jellyfish Invasions Along the Coast
Reports of meduse (jellyfish) have emerged across the region, with a notable concentration in Grottmmare and sightings in Fano. These jellyfish were found both in the water and washed up on the shore.
Two specific species have been identified: the Aurelia aurita, commonly known as the clover jellyfish, which is widespread and quite stinging, and the Chrysaora hysoscella, recognized by its red veins and considered less irritating.
The Appearance of “Sea Snow”
Visitors also observed a white foam known as neve di mare (sea snow). This phenomenon is a natural and transitory occurrence caused by the mucus of micro-algae.
Officials clarify that this foam consists of inoffensive organic substances and is not the result of pollution or liquid spills. The appearance of this foam was likely triggered by a sudden rise in temperature.
Weather Outlook
Though the holiday weekend provided an early taste of summer, these conditions are not expected to persist. According to weather forecasts, temperatures are destined to change.
Frequently Asked Questions
What is the “sea snow” seen on the beaches?
It is a white foam caused by the mucus of micro-algae. It is a natural, transitory phenomenon composed of inoffensive organic substances.
Is the white foam on the beach a sign of pollution?
No, the foam has nothing to do with pollution or the spilling of liquids; it is likely caused by a sudden increase in temperature.
Which types of jellyfish were reported in the Marche region?
The two types identified are the Aurelia aurita (clover jellyfish), which is quite stinging, and the Chrysaora hysoscella, which has red veins and is less irritating.
Do you prioritize water clarity or temperature when choosing a beach for your first swim of the year?
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