1. Dolphins

Dolphins are known to be highly intelligent species, but you might not have heard that they are also highly adept at consuming drug-like chemicals. They have been observed with pufferfish in their mouths, gently squeezing them to release a neurotoxin that causes them to enter a trance-like state. While Tetrodotoxin (the poison commonly found in pufferfish) can be lethal in higher doses – it’s about 1,200 times more deadly than cyanide – it gives the dolphins a peculiar sensation when consumed in very small doses. The dolphins were reported to be seen staring at their reflection beneath the surface of the water, and gently handing the pufferfish as to not release too much toxin.