toxic environment

Two dolphins—Shadow and Chelmers—died of a drug overdose at the Connyland Marine Park in Switzerland. Forensic experts suppose that partygoers at a nearby rave placed a heroinlike substance into the dolphins’ tank water. The dolphin trainers who found Chelmers described him as “shaking all over and foaming at the mouth.” Based on these symptoms and the presence of buprenorphine in the dolphins’ bodies, it seems likely that the dolphins died due to their toxic environment.