Among the carriers is the pufferfish, sought after in Japan as a very expensive delicacy, because a mild dose of the poison creates a certain euphoria. It is expensive in lives, too. A few succumb each year to this Japanese roulette. There is also evidence that TTX is served up by voodoo exponents, whose victims can become paralyzed, entering a hibernation state where pulse and breathing are no longer detectable. Taken for dead, they are buried, later to be exhumed and, still confused and in shock, enslaved by their new masters.
Carnivorous plants are also adept at passive aggression.
Nonetheless, the acid and enzyme cocktails that are served up in the depths of some pitcher plants, though evolved to trap insects, have been known to even snare rats. Another aggressor featured in these pages can only be called passive in a geographical sense. Feral cats do not choose where they live. They are the waifs of a throwaway culture. Many are drawn to large urban parks, or are dropped off there in misguided acts of compassion.