There are more than one kind, however, I think "nautilus" is the answer you are looking for.
or if you are looking for the scientific name it is "cephalopod mollusc"
A spiral seashell is commonly known as a "conch shell." These shells are characterized by their spiral shape and can vary in size and color depending on the species. Conch shells are often found washed up on beaches and are popular collectibles.
Salufi
The scientific name for common seashells is "Gastropoda." This is a class of mollusks that includes a wide variety of species with shells. Additionally, within the Gastropoda class, there are many families and genera that further classify different types of seashells.
A seashell is typically classified in the kingdom Animalia.
The Nautilus belongs to the kingdom Animalia. It is a marine mollusk with a spiral-shaped shell.
A spirillum belongs to the kingdom Bacteria. It is a type of bacteria that is characterized by its spiral shape.
Nummulites is a genus of fossilized foraminiferans, which are a type of single-celled marine organisms with a shell. They were abundant during the Eocene period and are characterized by their large, disc-shaped shells with a spiral pattern. Nummulites are important for paleontologists in dating and correlating rocks from that time period.
A conch.
"Concha" is a Spanish word that means "shell" or "seashell." It can also refer to a sweet bread roll with a unique spiral shape on top that resembles a seashell.
Tridacna gigas, the giant clam, is the larges species of seashell.
Other than scrubbing with a brush that is small enough to get into the smaller spirals and using a bit of bleach I do not know how one would clean a spiral seashell. I have no experience of cleaning algae off sea shells because I would never put one into a fresh water aquarium where it would have an effect on the pH and hardness of the water.
Trilobite.
A cockle shell
Arabic, meaning "seashell"
i seeshells or i seashells
because it was spiral
Some kinds of crafts one can make with seashells are: seashell frames, seashell chimes, seashell angels, seashell collages, seashell lamps and seashell mosaics.
chumash represents "bread maker" or "seashell people"
Spiral Jackson's birth name is Kenneth Lee Jackson Jr..