Snails are diverse in shape, such as long, round, and flat. The most unique shapes are those with hair. For example, Aegista mackensii and Aegista impexa possess hair-like structure on the shell. What function do these hairs play? It is still inconclusive. Some scientists suggest that these keratin hairs could deter the predators, while some believe that they are for maintaining moisuture. Studies also indicate that the evolution of hair-like structure associates with wet habitats, helping its owner attach on the swaying leaves. No matter what function these hairs play, long-haired snails are fascinating.