Draculin

The creature doesn't really feel the cut initially because the blade is so sharp, the tooth is so sharp.

And they have an enzyme in their saliva, which some boffin in a laboratory named Draculin, which thins the blood.

So that means that the blood flows freely out of the wound they have inflicted and they can just lap it up with their tongue.

It's

So to stop that from happening, the bat spits a special saliva into the little cut.

And this saliva has a protein in it called draculin.

Draculin.

Best name ever.

Right.

Draculin is an anticoagulant.

That just means it stops the blood from making a scab.

It keeps the blood flowing like a liquid so the bat can easily lap up its meal.