Hippos are often seen as calm animals that spend their days relaxing in rivers and muddy waters. But behind their peaceful appearance is one of the most dangerous animals in Africa. Despite being herbivores, hippos are highly territorial, extremely powerful, and responsible for hundreds of human deaths every year.
Their massive size makes them intimidating, but their behavior is what makes them truly dangerous. A threatened hippo can charge with surprising speed, and its enormous jaws are capable of causing devastating injuries.
For South African farmer Marius Els, however, one hippo was not a creature to fear.
It was a friend.
Marius became famous for his unusual relationship with Humphrey the hippo. Humphrey was rescued after being separated from his environment during a flood when he was only a young calf. When he could no longer be cared for, Marius decided to take him in and provide him with a home on his farm.
Instead of treating Humphrey as a wild animal, Marius raised him like a family member. He built a large artificial lake on his property so the hippo could swim and feel comfortable. Over time, the two developed what appeared to be a unique bond.
Humphrey allowed Marius to ride on his back, both in the water and on land. He responded to commands and even opened his mouth so Marius could brush his teeth. To Marius, this proved that even one of Africa’s most dangerous animals could form a connection with a human.
He believed Humphrey trusted him completely.
Marius once explained that people often think only dogs, cats, and other domestic animals can build relationships with humans, but he believed he had created a special bond with one of the most dangerous animals on the continent.
However, there was one thing Marius underestimated. Humphrey was never truly domesticated.
As the hippo grew, he became a massive animal weighing more than 1,000 kilograms. Adult hippos can reach several meters in length, have powerful bodies built for fighting, and possess enormous canine teeth that can grow up to 50 centimeters long.
Their bite force is incredibly strong, and their territorial instincts are always present. A hippo may appear relaxed, but when it feels threatened or believes its territory is being invaded, it can become extremely aggressive.
Marius’ family understood this danger. His wife repeatedly warned him that keeping a wild animal like Humphrey was risky, but Marius continued to trust his unusual companion.
Then, Humphrey gave the first major warning.
In 2010, Marius’ nephew Johan was attacked by the hippo while working on the farm. Humphrey suddenly charged toward him, and Johan quickly realized there was no way he could outrun such a powerful animal.
Hippos can reach speeds of around 30 mph on land, making them far faster than most people expect.
Johan described the impact as feeling like being hit by a vehicle. The attack caused serious injuries, with the hippo’s bite damaging his lower body and narrowly missing vital areas.
Marius rescued Johan, and he survived the encounter. But despite this terrifying warning, Marius continued to believe Humphrey would never hurt him.
Then, in 2011, tragedy struck.
Marius’ body was discovered in the same river where Humphrey had once been rescued. Investigators found that he had suffered fatal injuries from the hippo attack. The animal he had raised, cared for, and trusted for years had turned against him.
No one knows exactly what caused Humphrey to attack. It may have been a territorial reaction, a sudden instinctive response, or a moment when the animal felt threatened. But the result showed a painful reality about wild animals.
Even when they appear friendly, even when they recognize a person, and even when years of trust have been built, their natural instincts remain. Humphrey was not a pet. He was a wild animal with the strength and behavior of one of the most dangerous creatures on Earth.
Marius’ story became a warning about the risks of trying to turn powerful wild animals into companions. A hippo may allow a person to get close for years, but in a single moment, instinct can take over.
And when that animal weighs more than a ton, the consequences can be fatal.
