Wikipedia
Sicydiinae
The Sicydiinae are a small subfamily (about 118 species) of freshwater gobies, with only nine genera. They are usually found in fast-moving mountain streams in tropical islands. They are characterized by highly developed rounded suction discs and an amphidromous lifecycle. Adult lengths range from . Some species are popular in the aquarium trade. The genera included under Sicydiinae are:
:* Akihito Watson, Keith, and Marquet, 2007
:* Cotylopus Guichenot, 1863
:* Lentipes Günther, 1861
:* Parasicydium Risch, 1980
:* Raogobius Mukerji, 1935
:* Sicyopterus Gill, 1860
:* Sicyopus Gill, 1863
:* Stiphodon Weber, 1895
:* Sicydium Cuvier & Valenciennes, 1837