Anatomy
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Box Jellyfish Anatomy: Interactive Labeled Diagram
Explore box jellyfish anatomy with an accessible interactive diagram of the bell, velarium, pedalia, rhopalia, mouth, canals and tentacles.
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Why Are Box Jellyfish Transparent?
Learn how watery mesoglea, optical camouflage and efficient body construction give box jellyfish their nearly invisible appearance.
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How Box Jellyfish Venom Evolved
Box jellyfish venom evolved for prey capture and defense. Learn how toxin families diversify and why related species can pose different risks.
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Box Jellyfish Rhopalia: Eyes, Balance and Control
Explore the four rhopalia that carry a box jellyfish’s 24 eyes, orientation structures and neural pacemakers for coordinated swimming.
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How Box Jellyfish Nematocysts Work
See how box jellyfish stinging cells fire, why detached tentacles remain dangerous, and how nematocysts deliver complex venom mixtures.
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What Do Box Jellyfish Look Like? Safe Identification Guide
The box jellyfish has an alien-like appearance. A cube shaped body starts the creature’s design and four separate tentacles sling out from each corner…
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Do Jellyfish Have Eyes? How the Box Jellyfish’s 24 Eyes Work
Many well-studied box jellyfish have 24 eyes: six eyes on each of four sensory structures called rhopalia. Those eyes are not 24 identical cameras.…
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Box Jellyfish Size Compared With a Human: Species Chart
Box jellyfish range from very small species to large animals with a bell around 30 cm wide and tentacles extending several metres. Always attach…
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How Box Jellyfish Eyes and Vision Work
Box jellyfish have one of the most elaborate visual systems among cnidarians. Their eyes help guide behavior even though they do not have a…
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Do Box Jellyfish Have a Brain? Nervous System, Learning and Memory
Box jellyfish do not have a centralized brain. They do have neurons, distributed nerve networks and four specialized sensory centers that coordinate vision, balance…