A bell-shaped immortal jellyfish with a red stomach beside a polyp, a DNA helix, a life cycle arrow, and a ship hull silhouette on a light gray background.

4.5 Millimeters, 95% Water, and It Never Has to Die — Know This Jellyfish?

Jellyfish & Anemones

Difficulty

Hard

Questions

30

Volts

3/q

It's smaller than a fingernail but it never has to die. The immortal jellyfish rewinds its own life cycle, resets its telomeres, and hitches rides across oceans in ship ballast water. This quiz covers the biology behind true immortality.

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