Penguins are the main species of Club Penguin Island and of the multiplayer game Club Penguin. Penguins are divided into two main groups: members and non-members, as well as many subdivisions. Members are penguins who pay an amount of money in order to gain membership and acquire or unlock several extra features in their game-play, such as clothing or special levels of games, while non-members have access to only the basic or common features.
All penguins in Club Penguin have ID numbers, such as P103223183 or P169314173. The ID number signifies how old a penguin is in Club Penguin. For example, if a penguin's ID was P145965716 then they would be the 145965716th penguin created on Club Penguin. You might notice if that a penguin is made on an English server, their ID number would be their names if they went to a French server or to any other different language server. However, if you log on to the different language many times, your penguin will get his or her normal name back soon instead of the ID number.
The earliest known penguins are caveguins, also known as cave penguins. They lived on prehistoric Club Penguin Island with Dinosaurs. There, they worked, lived, and played. The caveguins have a more limited vocabulary than present-day penguins. Due to the Prehistoric Party, many caveguins were confused about the penguins coming from the strange shiny thing known as the Time Trekker. They then discovered that they were from the present.The only known named cave penguins are Garugg the Ugg Ugg and Dugglus. They also used Slang such as LOL.