What characteristics define silverfish?

Silverfish are indeed characterized by their flattened bodies, which are narrow at the top and broader at the bottom, allowing them to move swiftly in small spaces. Their distinct silvery-gray coloration, along with a shimmering appearance due to their scales, further distinguishes them from other household pests. This flattened shape, combined with their characteristic movement and color, makes them easily identifiable as silverfish.

Understanding these defining traits is important for pest management professionals because recognizing silverfish by their unique body shape and color can help in accurately identifying the pest in residential or commercial settings, which is crucial for implementing effective control measures.

The characteristics mentioned in the other options do not align with those of silverfish. For instance, a round body with a smooth surface contradicts silverfish's hallmark shape, while a black and orange striped appearance does not reflect their typical coloring. Additionally, silverfish are generally smaller than some other household insects, which rules out the notion that they are significantly larger.