Top 7 Most Hazardous Sea Creatures - Page 4 of 9

Box Jellyfish, the toxic mini-octopuses

It may be difficult to believe that a primitive form of life like the box jellyfish can secrete such a powerful toxin, but you can definitely take them as proof for the theory of evolution. Because they did not develop an external armor, their body is highly vulnerable to even the smallest fish. However, their 60 tentacles that come equipped with approximately 5,000 stinging cells and measure up to 5m for an adult box jellyfish constitute a powerful protection mechanism. Their presence in the vicinity of beaches as well as their translucent body are the two factors that really make these sea creatures dangerous for humans.