The superfish menu is a slick and slippery sliding suckerfish that smoothly drops down when the user glides over a parent menu item. Replicating the superfish menu is as simple as following and reproducing the settings as shown on the Zen Grid framework knowledgebase.

You will notice that the only thing that differentiates the super fish menu display and the panel menu display is the module class suffix -superfish. Beyond that setting up the two modules are completely the same.