Clarkichthys bilineatus
Clarkichthys bilineatus
- Least concern
- Card rarity: Common
- Fish

The flagtail wormfish is a species of wormfish native to the Pacific coast of the Americas from Mexico to Colombia as well as the Galápagos Islands. It is an inhabitant of tide pools and reefs being found down to a depth of about 8 metres (26 ft). This species grows to a length of 6.2 centimetres (2.4 in) SL. This species is the only known member of the genus Clarkichthys. The generic name is a compound noun made up of the surname Clark, to honour the American ichthyologist H. Walton Clark (1870–1941) who described the species and ichthys the Greek for "fish".
Classification
- Class
- Actinopterygii
- Order
- Gobiiformes
- Family
- Gobiidae
- Genus
- Clarkichthys