Never heard of such a thing. Do they burrow?
Here is more:
Native to Asia and Madagascar , the hammerhead worm, or Bipalium Kewense, was transported to Europe and the United States in shipments of exotic plants. It has been in the United States since the early 1900s and is most commonly found in states such as Louisiana, where conditions are warm and humid.
kewense can be killed with orange essence (citrus oil), and salt (as with slugs and snails). They can also be sprayed with a combination of citrus oil and vinegar; or just vinegar alone and it must be applied directly on the flatworm.
Because they feed voraciously on earthworms, which are critical for their role in aerating and fertilizing soil , hammerhead worms are considered a threatening invasive species. Native to Southeast Asia, hammerhead worms have been found in parts of the United States since 1980 and have become invasive around the world.Mar 30, 2022