Hammerhead worms, like other planaria, are essentially immortal. Usually, a worm reproduces via fragmentation, leaving behind a tail tip stuck to a leaf or other substrate, which then develops into an adult.

https://video.nostr.build/509ce8740aaf907c733fa55d53d2c07c50b61fbdd8d28d58ddd2231f4ae6a48f.mp4

If the worm is cut into pieces, each section can regenerate into a

fully-developed organism within a few weeks. Injured worms rapidly

regenerate damaged tissue.

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