I had the idea of filming jellyfish, after experiencing a very strong and unexpected calming effect when I recently visited the Aquarium Berlin.
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Jellyfish have a fascinating nervous system that's quite different from most animals we know. Instead of a centralized brain, jellyfish possess a "nerve net," a decentralized network of neurons spread throughout their bodies. This nerve net allows them to sense changes in their environment, such as light, temperature, and touch, and respond accordingly.
The nerve net is connected to a structure known as the "ring nerve," which is located around the base of the bell (their main body part). This ring nerve coordinates their movement and controls the rhythmic pulsing that enables them to swim. Some jellyfish even have specialized sensory structures called "rhopalia," which contain light-sensing organs (ocelli) and balance sensors (statocysts) to help them navigate.
What's amazing is that despite not having a brain, jellyfish can perform complex behaviors like hunting, escaping predators, and even synchronizing their movements in groups. Their nervous system offers a glimpse into how early nervous systems might have evolved in the animal kingdom.
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Filmed at the Aquarium Berlin
Music from KZitem Video Editor
Text by ChatGPT 4o
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