Notocochlis chemnitzii, or Chemnitz' moon snail, is a species of gastropod mollusc.

[3] They live in the intertidal zone, down to 3 meters (10 feet) deep, on sand and mud flats.

It uses an abrasive appendage called a radula to drill into the shells of small clams.

Once inside, it secretes digestive fluids and then feeds on the clam slurry that results.

There is some evidence that one of the species it preys on is Chionista fluctifraga, the smooth Venus clam.