10 Animals You Could Never Keep as a Pet

Chimpanzees share 98.7% of human DNA — but that similarity is why they make terrifying, not terrific, pets. A fully grown chimp is 4x stronger than an adult human. They have been banned across most of the world due to devastating attacks on owners and bystanders alike.

Grizzly bear cubs look adorable. But adult grizzlies weigh over 600 lbs, can run 35 mph, and have been responsible for fatal attacks on humans. Private ownership is banned or severely restricted across North America and most of the world.

Venomous snakes such as king cobras and mambas are strictly banned in most countries and US states. Their venom can kill a human in under an hour. Even ‘defanged’ snakes can regrow venom glands. As of 2026, ownership without specialist permits is illegal in the majority of jurisdictions worldwide.

Crocodiles are among Earth's most efficient killing machines. The Nile crocodile — responsible for hundreds of human deaths annually — is banned as a pet virtually everywhere. They grow over 16 feet long and can live 70+ years, making them utterly unmanageable in domestic settings.

Despite what circus trainers suggest, lions are fundamentally wild. Adult males can weigh 550 lbs and lions kill prey through suffocation and blunt force trauma. Keeping a lion as a pet is banned across the EU, UK, Australia, and under the U.S. Big Cat Public Safety Act of 2022.

The world’s largest living lizard grows up to 10 feet and delivers a lethal combination of venom and septic bacteria with every bite. As a critically endangered species, Komodo dragons are protected under CITES and banned as pets by Indonesian law and international trade agreements.

Hippos are responsible for an estimated 500 human deaths per year in Africa — more than lions or leopards. Despite looking slow and lumbering, they can sprint at 20 mph on land and have razor-sharp 20-inch canines. Private hippo ownership is banned worldwide.

African elephants are the largest land animals on Earth, weighing up to 14,000 lbs and roaming up to 50 miles per day. Their complex social needs, potential for destruction, and endangered CITES status make private ownership legally impossible. They are protected by international treaty in nearly every country.

A silverback gorilla can lift over 1,800 lbs — roughly 10 times its own body weight. As a critically endangered great ape, gorillas are protected under CITES Appendix I, making private ownership a criminal offence in virtually every nation on Earth.

There are more tigers living in captivity in the U.S. than in the wild worldwide — yet keeping one is now federally illegal under the Big Cat Public Safety Act (2022). Tigers are solitary apex predators that can grow to 660 lbs. They are listed on CITES Appendix I and banned as pets internationally.