Box Jellyfish, a jellyfish found in Northern Australia waters, has tentacles that each contain up to 750,000 nematocysts. The tentacles are raised and lowered allowing 'fishing' at various depths.
The stomach cavities of colonial polyps are interconnected, enabling food to be shared among all the polyps within the colony. If one polyp catches more than its fair share of food, it is shared with the colony.
