精器鱼科为辐鳍鱼纲银汉鱼目的其中一科。

本科鱼类分布于亚洲东南亚淡水及半咸水域。

The priapum fishes are a family, Phallostethidae, of atheriniform fish native to freshwater and brackish habitats in southeast Asia.

They are small, no more than 3.5 cm (1.4 in) in length, with partially translucent bodies. They are found in fresh and brackish water from Thailand to the Philippines and Sulawesi. They are named for a muscular organ found under the chin of males. This organ, which may possess small testicles, is used together with the pelvic fins to grasp the female during mating. Unlike most other fish, priapum fishes exhibit internal fertilisation.