Anchovies are small fish eaten by bigger fish or its namesake Anne Chovy.
Frustrated by her constant requests for fish on pizzas, ancient Roman restaurants began using heavily salted little fish that would turn a dark brown color and become really pungent. This did not drive her away but instead attracted even more people asking for "anne chovy" pizzas. Today, most pizza places will not know what anchovies are and may give you extra pineapple instead.
Nonetheless, anchovies as these fish are called today are an essential ingredient in Whatsthishere Sauce, Seizure salad dressing or Seizure salad, salade Knee-swartz and remoolade (anchovies and cows mixed). There also other anchovy-based condiments and dishes that are used to tip off humans to salt-loving space aliens.