Venomous Weever Fish Surge in Kattegat, Offering Commercial Hope Amidst Swimmer Risk

The Kattegat sea is experiencing an unprecedented surge in its population of weever fish, a venomous species that is also considered a delicacy. Danish fishermen have reported catching approximately 800 tons of weever fish this year alone, a figure that suggests a dramatic increase in their numbers. Biologists estimate that the current population may be the largest ever recorded in the region. This abundance presents a potential economic opportunity for fishermen, who are exploring commercial fishing prospects for the species. However, the weever fish is notorious for its venomous dorsal spines, which can inflict excruciating pain and swelling upon contact, leading to its moniker, 'sea viper.' While the venom is contained in the spines and the fish is edible, the risk to swimmers is a significant concern. Experts speculate that the weever's population boom may be linked to a sharp decline in cod stocks. Cod are natural predators of the weever, and their reduced numbers could be allowing the weever population to flourish unchecked. Swedish fishermen have not observed the same dramatic increase, partly because they do not specifically target weever fishing. However, they do encounter them as bycatch when fishing for Norway lobster and mackerel, sometimes having to avoid areas with high weever concentrations. The weever fish, scientifically known as Trachinus draco, inhabits sandy seabeds and possesses venomous spines on its gills and dorsal fin, which remain potent even in dead fish. Immediate treatment for a sting involves immersing the affected area in hot water (40-45°C) for up to an hour. Medical attention is advised if pain persists, symptoms worsen, or if there are signs of infection or systemic effects like headache or dizziness.

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There have probably never been as many weever fish in the Kattegat as there are now.