Behavior
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Do Box Jellyfish Sleep?
Box jellyfish show activity rhythms and pauses, but scientists have not established human-like sleep. Learn what evidence a sleep claim requires.
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Box Jellyfish and the Moon: Lunar Migration Explained
Some box jellyfish gather near shore on a lunar schedule. Explore Hawaii’s Alatina alata migration and why it is not a global safety calendar.
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How Box Jellyfish Swim and Steer
Box jellyfish actively swim with jet propulsion and steer by reshaping the velarium. See how vision, rhopalia and muscular pulses work together.
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How Do Jellyfish Reproduce? The Box Jellyfish Life Cycle
The box jellyfish life cycle alternates between a tiny attached polyp and a free-swimming medusa. Details differ among species, so the sequence below is…