The Box Jellyfish has tenicals 3 metres long with a box head shape. The jelly fish eats small fish, shrimp and other jelly fish and live near the soreline in summer mounts. These sea animals breed in mangroves/swamps of northern Australia, they are very toxic as they sting with there tenicals putting enough venom in to the victim to kill an adult, they also can wrap there tenticals around you causing you too freak out and drown.
This is damage from a Box jelly Fish.