Jellyfish With their ethereal translucent bodies and way of moving in the water, jellyfish have long inspired curiosity, wonder, and awe. (more) Do Jellyfish Have Brains? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Do-Jellyfish-Have-Brains Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　External Websites Ask the Chatbot a Question Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors. The Editors of Encyclopaedia Britannica Last Updated: Mar 18, 2025 • Article History Table of Contents Table of Contents Ask the Chatbot Jellyfish, with their ethereal translucent bodies, seem otherworldly, and watching them move in the water like glowing apparitions inspires curiosity and raises questions, such as whether they possess a brain. The short answer is no, jellyfish do not have brains. They instead possess what is known as a nerve net—a primitive nervous system that is distributed throughout their bodies. A nerve net is a diffuse meshlike system of nerve cells and fibers that is interconnected across the body. Jellyfish—along with other cnidarians, such as corals and sea anemones—possess nerve nets, as do ctenophores (comb jellies). This system allows these animals ...(100 of 169 words)

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