Longbarb Dragonfish
Flagellostomias boureei
- Least concern
- Card rarity: Common
- Fish

Flagellostomias boureei, the Longbarb dragonfish, is a species of barbeled dragonfish found in the ocean depths worldwide. This species grows to a length of 32.2 centimetres (12.7 in) SL. This species is the only known species in its genus.
Classification
- Class
- Actinopterygii
- Order
- Stomiiformes
- Family
- Stomiidae
- Genus
- Flagellostomias