Cerithium

Cerithium is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Cerithiidae, the ceriths.

[2] Species within this genus include: The genus is known from the Triassic to the Recent periods (age range: from 221.5 to 0.0 million years ago).

Fossils shells have been found all over the world.

There are about 100 extinct species[4][5] including:

Fossil shells of Cerithium crenatum from Pliocene of Italy
50 second video of snails (most likely Natica chemnitzi and Cerithium muscarum ) feeding on the sea floor in the Gulf of California , Puerto Peñasco , Mexico