This animal’s poison is so unique that science is yet to develop an anti-venom for it

Scientists studying platypus venom have discovered it contains a cocktail of at least 19 different peptides, including some with absolutely no known equivalent in any other animal. That’s right, we don’t even have names for some of them yet. One component includes a D-amino acid, something rarely found in nature, let alone in mammals. According to Encyclopaedia Britannica and research referenced by the University of Sydney, this venom is incredibly complex and difficult to replicate or neutralise.

Male platypuses can deliver venom strong enough to cause intense pain in humans, and there’s no antivenom. (file)

So, what happens if you get stung?

First of all, it’s not fatal. But that doesn’t mean it’s harmless. Victims stung by a platypus (usually wildlife handlers or curious pets) describe the pain as excruciating, worse than a broken bone, worse than surgery, and in some cases, the pain lasts for weeks or months. Some people report swelling that spreads up the entire limb and, even more disturbingly, a lingering hypersensitivity to pain that remains long after the wound heals.

And here’s the kicker: morphine doesn’t help. Standard painkillers often have little to no effect, which only makes the experience more miserable.

Why does no antivenom exist

Given how painful the venom is, you’d think scientists would have developed an antivenom by now. But the reality is more complicated. First, platypus envenomations are extremely rare, only occurring during a short window in the mating season, and only in adult males. Second, the venom’s unique composition, with those rare peptides and unusual amino acid structures, makes it unlike any other animal venom we’ve studied. There’s no “template” for treatment.

Simply put, the problem isn’t a lack of urgency. It’s that the platypus venom doesn’t follow any of the rules we usually use to develop antidotes. It’s like trying to write a dictionary for a language only one creature speaks, and it changes the grammar every year.

Why does the platypus even have venom?

Unlike snakes, which use venom to kill prey, the platypus uses its venom for fighting, not feeding. During the breeding season, males become territorial and aggressive. They use their venomous spurs to fend off rivals as they compete for female attention. Think of it less as a weapon for hunting and more as a tool for winning brawls on the riverbank.

Interestingly, females are born with spurs too, but they drop off early in life and don’t develop venom glands. It’s one of several ways that this species challenges our expectations of how mammals are “supposed” to behave.

Despite the suffering it can cause, the venom of the platypus might actually help people one day. Some scientists are studying its unique components to gain a better understanding of pain pathways in humans, which could lead to the development of next-generation painkillers. One hormone-like chemical in the venom, for example, mimics a human protein used in diabetes treatments, but lasts far longer in the bloodstream. That could eventually lead to longer-acting diabetic medication.

While the platypus may cause pain today, it could hold the key to easing it tomorrow.