The team's analysis showed that Hallucigenia's mouth was surrounded by a ring of spiny teeth, probably used to suck up food, while the throat was lined with a row of needle-like teeth which possibly prevented its lunch slipping back out.
At a mere one to five centimetres long, the armoured worm lived during a period of Earth's history called the Cambrian Explosion, when most major animal groups emerged.
First identified in the 1970s, Hallucigenia's closest living relative is the toothless velvet worm...
and here is a short video about the toothless velvet worm, that slimes it's prey to death:
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