Twilit Vermin are enemies from The Legend of Zelda: Twilight Princess. They are first encountered when Link is a wolf in the Underground Waterway, essentially as Twilight versions of Rats. They are quick and blend in well with the dark twilight environments they inhabit; however, they are quite weak and can be killed with one strike. They usually appear in large groups when Link completes a certain task, appearing to come from nowhere. Their greatest strength is in their ability to strike Link while he is defenseless in the water; combined with their stealth, this can be fatal early in the game when Link only has three Hearts. Like their Light World counterparts, Twilit Vermin like to gnaw on Skulls and the telltale sound of their gnawing serves as a cue to Link that they are nearby.