
Community identification
Hammerhead Worm
Bipalium kewense
- Order & Family
- Order: Tricladida; Family: Geoplanidae
- Size
- Typically 5 to 20 cm in length, though some can grow up to 30 cm or more.
Natural Habitat
Damp, humid environments such as under rocks, logs, or leaf litter; often found in greenhouses or gardens.
Diet & Feeding
Carnivorous and predatory, primarily feeding on earthworms, slugs, insect larvae, and snails.
Behavior Patterns
Nocturnal and photophobic; uses a sticky secretion to trap prey and external digestion to consume it. Capable of asexual reproduction through fragmentation (regrowing from severed pieces).
Risks & Benefits
Invasive species that disrupts soil ecosystems by preying on beneficial earthworms. They produce tetrodotoxin (a potent neurotoxin), so they should not be handled with bare hands or consumed by pets.