In Spanish they are known as “pececillo de plata de cola larga” or “pez plateado de cola larga”
The wikipedia entry is fascinating… Scroll down to the Control paragraph….
Due to their relatively slow development and longevity and their ability to survive up to ten months without food, control measurements against the gray silverfish have to be applied over an extended period of time. An integrated pest management, applying several control measurements in parallel, has been proposed as the most promising approach for the control of this species. This includes the removal of potential food sources such as food crumbs by wiping the floor also beneath and behind cooking stoves and refrigerators, and storage of dried food products, including tea bags and animal food, in sealed containers. Reducing the amount of water used during cleaning will reduce indoor humidity, which is detrimental for egg development.[30] It should also be kept in mind that gray silverfish do not have to drink, and can use the water vapour contained in air of 60% relative humidity and higher as their water source instead
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