Invasive Toxic Pufferfish Threatens Mediterranean Coasts, Prompting Urgent Control Measures

A dangerous invasive fish species, the silver pufferfish, is rapidly spreading across the Mediterranean Sea, threatening coastal regions from Greece and Cyprus to Israel. Originating from the Red Sea, the fish entered the Mediterranean through the Suez Canal and has been proliferating due to warming waters and increased salinity. Known for its sharp teeth capable of tearing cans and inflicting severe injuries, the pufferfish carries a potent neurotoxin called tetrodotoxin, which can cause heart and lung failure and is deadly if ingested.

The fish has already caused health incidents, including a dog in Netanya, Israel, falling seriously ill after licking one. Medical professionals warn that initial poisoning symptoms include vomiting, weakness, and muscle tremors, which can escalate rapidly to respiratory paralysis and death if untreated. Israeli Nature and Parks Authority officials report the fish is frequently caught in fishing nets but often discarded on beaches, posing risks to children and pets who may come into contact with them.

In response, Greek authorities have issued urgent warnings after multiple attacks on swimmers, including a recent incident where an elderly woman required stitches. Greek fishermen report significant damage to their nets caused by the fish's biting, threatening their livelihoods. To combat the invasion, Greece has installed 2.5 kilometers of floating barriers in key bays to block the fish, initially intended for jellyfish control but effective against the pufferfish as well.

Cyprus launched a government incentive program in 2024, offering financial rewards to fishermen who help eradicate the species, resulting in the destruction of over 100 tons of pufferfish. Athens recently introduced a similar initiative, paying 5 euros per kilogram of fish handed over for incineration. Authorities urge fishermen not to leave caught pufferfish on beaches and advise immediate medical treatment for any bites, including thorough wound cleaning and pressure application.

The rapid spread and toxicity of the silver pufferfish have made it a significant environmental and public health concern across Mediterranean coastal nations, prompting coordinated efforts to control its population and protect local ecosystems and communities.