A study published in the journal Environmental Pollution has revealed alarming levels of contamination in sharks near Eleuthera island in the Bahamas. Scientists analyzed the blood of 85 sharks, including nurse, Caribbean reef, and lemon sharks, and found traces of cocaine, caffeine, acetaminophen, and diclofenac in three of the five species studied. This is the first global report of caffeine and acetaminophen found in sharks, as well as the first record of cocaine and diclofenac in Bahamian sharks. The most alarming finding is that these substances were found circulating in the blood, not just floating in the water, indicating recent exposure. While the sharks showed no obvious physical signs, researchers did detect alterations in metabolic markers associated with stress. The lead author of the study, biologist Natascha Wosnick, emphasized that the problem is not just cocaine, but also 'normalized' substances from everyday life, such as stimulants and over-the-counter drugs. The main hypothesis is that the contamination comes from wastewater discharge, waste dumping from boats, and increasing human pressure on previously isolated areas. In one case, a juvenile lemon shark in a nursery area tested positive for cocaine, reinforcing the suspicion that pollutants are seeping into sensitive Caribbean habitats. Although there is no immediate threat to humans, there is a potential chronic impact on the health and stability of shark populations, which are critical to the marine ecosystem balance.
