Silverfish are considered pests, so the word often implies destruction or nuisance.

Negative Connotation

Silverfish thrive in humidity, so they're commonly discussed in relation to damp environments.

Habitat Detail

Mention of silverfish often indicates a household issue, especially relating to old or poorly-stored items.

Domestic Problems

 Environmental consideration was served with every plate, but it was served with a heaping mound of consideration for human interests at the same time. One of the other things we did was begin to diversify the species that we served -- small silverfish, anchovies, mackerel, sardines were uncommon.