- Danger Level: 10/10
While Box Jellyfish can be seen in various places, they have been known for their heavy connection to the Australian region for many years. The species is responsible for more serious injuries to humans than sharks, sea snakes, and stingrays combined annually. Plus, they are known for killing up to 50 people per year. How do they accomplish so many injuries and even deaths each year? First, it’s due to traveling in packs where you won’t just see one jellyfish but often several.
Second, they rarely sting just once. When you are attacked with just one swipe of their venomous tentacles, they will send more in rapid succession. They contain what is known as “jellyfish venom,” which is mostly a combination of powerful neurotoxins. It can paralyze people, make it hard to breathe, cause heart problems, cause necrosis, shock, etc. That can make getting to safety after an attack quite hard. Depending on the severity, people can die from a sting or series of them anywhere from a few minutes to a few hours. It’s all dependent on the person ultimately.