Octopuses regenerate lost arms, including nerve tissue
AI-generated cover illustration: звичайний восьминіг на кам’янистому морському дні; зображення показує тварину, але не відрізняє руку, що відростає. Походження: OpenAI image generation. Дата: 2026-10-20. Промпт: “Photorealistic vertical 4:5 editorial cover of a common octopus resting on a rocky Mediterranean seafloor, one arm visibly shorter with a small rounded regenerating tip, other arms spread naturally with suckers visible, rich but realistic underwater colors, soft natural light, accurate octopus anatomy. The shortened arm and small regrowing tip are an illustrative reconstruction of arm regeneration, not documentary evidence or an exact study specimen. No injury, blood, labels or text.” Запитану ознаку коротшої руки генератор не відтворив; це загальна ілюстрація восьминога.
A common octopus can regrow a lost arm. During regeneration, new tissues form, including nerve fibers that researchers traced to the new arm tip, where they connect the nervous system to the regenerating tissue. So it is not only the outer shape that returns: part of the nervous system is rebuilt in the new appendage too.



