Can Dead Jellyfish Sting?  How Do Stinging Cells (Nematocysts) Work? Is Vinegar Effective?

Jellyfish washed up on beach

Yes, dead jellyfish can still sting you, even if you find one washed up on the beach.  And it doesn’t have to be a whole jellyfish – even small bits and pieces of tentacle can cause a painful sting. This is because the stinging cells, or nematocysts, can remain viable and ready to fire for … Read more

Irukandji Jellyfish Facts and Adaptations (Can They Kill You? Are they spreading?)

Irukandji by Lisa-ann Gershwin

We like to snorkel in tropical waters throughout the world and, as biologists, we’ve learned to be cautious when it comes to jellyfish.  Not only are jellyfish stings painful; some species can kill you!  In this article I will explore some of the latest scientific findings on one of the most dangerous groups of jellyfish … Read more