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Hammerhead Worm - Bipalium - Animal India

''Hammerhead worms,'' or ''Broadhead planarians'' (genus Bipalium), are large predatory, carnivorous, and even cannibalistic land planarians. Some species prey on earthworms, while others may also feed on mollusks. They are called hammerhead worms due to the distinctive shape of their head region. Land planarians are unique in possessing a ''creeping sole,'' a highly ciliated region on the ventral epidermis that aids in their movement over substrates. Native to Asia, several species have become invasive in the United States, Canada, and Europe. Some studies have begun investigating the evolutionary ecology of these invasive planarians. Reproduction in Bipalium can be either asexual or sexual, and all species are hermaphroditic. A hammerhead worm was observed in Tehatta, West Bengal, India, on August 28, 2024, displaying its characteristic slender or elongated body, moving in a snake-like fashion with its head bobbing from side to side. (Photo by Soumyabrata Roy/NurPhoto)

Photo ID	#11524229
Date Taken	28 August 2024
Location	N/A
Photographer	Soumyabrata Roy/NurPhoto
Category	Human Interest
Copyright	© 2026 NurPhoto - Soumyabrata Roy/NurPhoto

Hammerhead worms Broadhead planarians Bipalium predatory carnivorous cannibalistic land planarians earthworms mollusks distinctive head shape creeping sole ciliated ventral epidermis movement substrates native to Asia invasive species United States Canada Europe evolutionary ecology asexual reproduction sexual reproduction hermaphroditic Tehatta West Bengal India August 28 2024 slender body elongated body snake-like movement head bobbing Soumyabrata Roy NurPhoto.