Some jellyfish sting deeper than others
![jellyfish](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/09/wt_jellyfish-sting_free.jpg?fit=860%2C460&ssl=1)
The moderate sting from this Chrysaora pacifica jellyfish comes from a small number of stinging nematocysts that are long enough to penetrate the skin of its prey (or an accidental victim). More painful species have longer stingers and more of them, a new study finds.
harum.koh/Flickr (CC-BY-SA 2.0)