食藻鳅科，又名双孔鲤科或双孔鱼科，为辐鳍鱼纲鲤形目中鲤亚目的其中一科。

食藻鳅科其下仅有一属：

• 双孔鱼属(Gyrinocheilus)
  • 湄公双孔鱼(Gyrinocheilus aymonieri)
  • 暹罗双孔鱼(Gyrinocheilus pennocki)
  • 金边双孔鱼(Gyrinocheilus pustulosus)

Gyrinocheilus is the single genus in the family Gyrinocheilidae, a family of small Southeast Asian cypriniform fishes that live in fast-flowing freshwater mountain streams. The species in this genus are commonly called "algae eaters." They hold on to fixed objects using a sucker-like mouth, and, despite the name, feed on a wide range of detritus, rather than simply on algae. A "golden" variety of G. aymonieri, the Chinese algae eater or "sucking loach", can be found in many pet shops and fish farms.