Dartfishes are a group of fish, formerly considered to be a subfamily, Ptereleotrinae, of

goby Goby is a common name for many species of small to medium sized ray-finned fish, normally with large heads and tapered bodies, which are found in marine, brackish and freshwater environments. Traditionally most of the species called gobies have b ...

-like fishes in the family Microdesmidae of the order

Gobiiformes The Gobiiformes are an order of fish that includes the gobies and their relatives. The order, which was previously considered a suborder of Perciformes, is made up of about 2,211 species that are divided between seven families. Phylogenetic rel ...

, Authorities now consider the species in the family Microdesmidae are within the

Gobiidae Gobiidae or gobies is a family of bony fish in the order Gobiiformes, one of the largest fish families comprising more than 2,000 species in more than 200 genera. Most of gobiid fish are relatively small, typically less than in length, and the ...

, although the researchers do not define the taxonomic status of this grouping within that family. They are saltwater fish.

References

{{Taxonbar, from=Q16671538 Microdesmidae Gobiidae