Concerns over potentially dangerous marine species in the Mediterranean have resurfaced, shifting from the spread of invasive pufferfish to reports involving the gray triggerfish.
The latest alarm follows two incidents in southern Italy, where swimmers suffered deep leg wounds within three days of each other. Although the species responsible has not been conclusively identified, Italian reports have cited the gray triggerfish (Balistes capriscus) as one possible explanation.
76-Year-Old bitten while swimming near Palinuro
The most recent incident occurred in the waters off Palinuro, near Saline Beach, where a 76-year-old man was bitten on the leg while swimming.
He returned to shore with a deep wound and significant bleeding. A lifeguard immediately administered first aid and controlled the bleeding before the swimmer was transported to a hospital for further treatment.
Swiss tourist injured near Pioppi
Three days earlier, a similar incident was reported near Pioppi, another coastal community in the Cilento area.
A 55-year-old Swiss tourist felt a sudden, intense pain while swimming. Lifeguards treated him at the scene before he was taken to a hospital, where doctors closed the wound with stitches.
The two incidents have attracted attention because they occurred within a short period and along the same stretch of southern Italy’s Mediterranean coastline.
What is the gray triggerfish?
The gray triggerfish is a sturdy marine species known for its powerful jaws and prominent teeth. Its mouth allows it to crush hard-shelled prey, including mollusks, crustaceans, and sea urchins. Because of this strength, a triggerfish bite can cause deep cuts, heavy bleeding, and injuries that may require stitches.
Gray triggerfish have long inhabited Italian waters and other parts of the Mediterranean Sea. They also occur in sections of the Atlantic Ocean. The species does not generally seek contact with humans and is not normally considered dangerous to swimmers.
However, it may respond aggressively when it feels threatened.
Triggerfish can become particularly territorial during the breeding season, when they guard their nesting areas and protect their eggs. A swimmer who unknowingly enters such an area may trigger a defensive response.
Why triggerfish may approach swimmers
Most encounters occur when swimmers move too close to a fish, a feeding area, or a nest. Unlike many marine animals that immediately retreat from humans, a territorial triggerfish may defend its space. It can approach rapidly and bite a swimmer’s feet, legs, or hands.
Bright objects, food, and attempts to touch or photograph the fish at close range may also increase the risk of an encounter. Experts generally advise swimmers to observe marine life from a distance and avoid interfering with an animal’s natural behavior.
How to stay safe around gray triggerfish
Swimmers who encounter a gray triggerfish should remain calm and move away slowly. They should not attempt to touch, chase, feed, or corner the fish. Sudden movements may cause a territorial animal to feel more threatened. Swimmers should also avoid entering areas where fish appear to be guarding the seabed.
Anyone who notices unusual marine activity should alert a lifeguard or local authority. Beachgoers should follow any warnings or temporary restrictions issued in the area. A person who suffers a bite should leave the water immediately and seek first aid. Direct pressure can help control bleeding until medical assistance arrives.
Doctors should assess deep marine-animal bites because the wounds may require thorough cleaning, stitches, antibiotics, or a tetanus evaluation. Although the suspected attacks have caused concern, serious encounters with gray triggerfish remain uncommon. The species is a long-established inhabitant of the Mediterranean, and most triggerfish avoid humans unless they feel threatened or need to defend a nesting site.
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