Explainer: Jelly vs. jellyfish: What's the difference?

Not all jellies are jellyfish

By Rachel Ehrenberg, 20:06 PM April 1, 2008

All jellyfish are considered jellies, but not all jellies are jellyfish. What gives? It turns out that having a body made of jelly doesn't necessarily mean you are a jellyfish. For example, the animals known as comb jellies look in many ways like true jellyfish, but are actually distant cousins. Comb jellies have different bodies than true jellyfish and don't make the stinging cells that jellyfish do. These stinging cells are called nematocysts (neh-MAT-oh-sistz).


Scientists are still trying ...

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