Research

Note:

Attacks

• Stun
• Has strong venom
• Kill their prey

Paraphrase:

The box jellyfish attack by stunning their prey. They have the most strongest venom, strong enough to send a person into shock or have a heart failure. Even if the box jellyfish prey struggle, it soundly injure their tentacle. They also kill their prey with their stun. (National Geographic) 

http://animals.nationalgeographic.com/animals/invertebrates/box-jellyfish/>