Deadly pufferfish invades Mediterranean, posing severe risks to swimmers and food safety.

Holidaymakers planning a summer getaway to the Mediterranean are facing a fresh warning: a dangerous marine invader has taken root in the region's balmy waters. The silver-cheeked pufferfish, also known as the silver-cheeked toadfish, has arrived via the Suez Canal, compounding the existing threats from jellyfish and sea urchins that already plague tourists.

This species possesses an arsenal of extreme defense mechanisms. It is armed with teeth so razor-sharp they can sever a human finger in a single bite, and it carries tetrodotoxin, a potent neurotoxin capable of triggering heart and lung failure. These traits render the fish completely inedible for humans.

The invader first made its appearance in the eastern Mediterranean in 2003 and reached Greek waters by 2005. However, recent years have witnessed a dramatic surge in their numbers and geographic spread, pushing their range toward Italy, Spain, and the rest of the western Mediterranean. Experts attribute this rapid expansion to climate change, which has warmed the seas and increased salinity, creating ideal conditions for the species.

The danger is no longer theoretical; it is personal. Greek media reported this week that an elderly woman required stitches after being bitten by one of these wild fish while swimming off the beach in Varkiza, near Athens.

Nota Peristeraki, a specialist at the Hellenic Centre for Marine Research, issued a stark advisory to the public. "If you see this fish approaching you, you really need to avoid it," she stated. She noted that several attacks have occurred when people attempted to feed or touch the animals, leading to cases where individuals lost a finger or a toe. Peristeraki emphasized that while these incidents are rare, the risk is significant: "You are more likely to encounter a shark. If you go snorkelling, you might not even see pufferfish. We have found the remains of fishing nets and hooks inside their stomachs."

The threat extends beyond human safety to the local fishing industry. Fishermen across the Mediterranean report that these creatures are inflicting heavy damage on their nets. Alexis Charlambakis, a fisherman in Crete speaking to the AFP news agency, described the situation as dire. "If one of these bites you, it will take your finger clean off," he said. "They are the destruction of the sea. They leave nothing behind. If this wasn't my boat, I'd quit this profession for good." His colleague, Giannis Giankakis, added that the fish is an omnivorous opportunist with no natural predators, eating anything it encounters.

In response to the crisis, nations are mobilizing to curb the population. In Cyprus, fishermen are currently paid bounties to catch as many pufferfish as possible, which are then incinerated upon reaching shore. Greece is actively considering implementing a similar compensation scheme. Meanwhile, scientists are investigating ways to repurpose the fish, such as grinding them into meal for farmed fish or converting them into crop fertilizers.