The species has been extending its range in many parts of the world.

However, it has been observed that some species can extend the head beyond the pronotum in active searching when on the ground.

Their distribution is pantropical, with a few species extending into temperate areas.

They are found in South America, with one species extending to Mexico.

Most are native to the tropics, with only a few species extending into temperate regions.

Several species extend into offshore waters of southern Indonesia.

The genus is pantropical, with some species extending into temperate areas.

Some small species can bend over and extend their tentacles to the sea floor to collect detritus.

They are native to western North America, and some species extend into northern Mexico.

The white-lipped snail has a similar range, but that species extends further north to border the Arctic.