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Threadlike cilia-bearing tentacles probe for food, such as forams, detritus, and even the occasional buried bivalve, and bring it to the mouth where a large radula grinds it up.
Most mollusks use the radula to break up food, but the cone snail uses it to inject venom.
In some chitons, the radula has teeth tipped with magnetite, which hardens them.
Once the prey is snared it is bitten with strong beak-like jaws and pulled into the mouth by the radula .
It is significant that a minority of ammonites and incirrate octopods have radular teeth of this type, or exhibit much size dimorphism.
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