Trichomycteridae's a family of catfishes (order Siluriformes) commonly known as the pencil or parasitic catfishes. This family includes the infamous candiru fish, feared by some people for its habit of entering into the urethra of humans. This family's prohibited to import into various parts of the USA. Taxonomy Trichomycteridae comprises about 41 genera and 207 species. It's the second-most diverse family of the superfamily Loricarioidea. Numerous species still remain undescribed. A large clad… (More on Trichomycteridae)