Who has ever picked up a shell from the beach and marveled at this discovery ?
Then comes the question : who’s the little guy ?
Beware though, every littoral zones are different and informations found online are often limited to a specific area. With this tiny info in mind, you can usually determine two to three possible identifications.
To reduce the possibilities and find its name, a finer and more acute observation and description is key: like the shell’s texture or its mother-of-pearl color.
As for every species, zoologists have thought -and fought- long and hard to find a way to name them. Pretty soon in science history, they felt the need to use a method that would prevent repetitions.
Such a method was theorised and described by Carl Von Linné (1707-1778), based on the use of a latin name made from two distinct part called the « binomial nomenclature » or « binary nomenclature »
The first part is the genus and the second one the species inside that genus.
If you ever encounter a new species, you will be able to name it any way you wish after publishing a full and exhaustive description there : http://iczn.org/.
Unless somebody beat you to it…