Why are they called mystery snails?

They are called mystery snails due to their ability to seemingly disappear and reappear in the tank. Some aquarists have noted that mystery snails have a tendency to vanish without a trace for a few days. Later, they mysteriously come back as if they never went missing in the first place.

Aside from their Houdini-like disappearing ability, there is another reason why they’re called mystery snails: these gastropods reproduce very quickly. Female mystery snails can keep laying eggs even after being without a mate for months.

Mystery snail babies often go unnoticed, only becoming visible when they become fully developed juveniles. Therefore, a tank’s snail population can appear to double overnight.