沟口鱼科为辐鳍鱼纲棘背鱼目的其中一科。

沟口鱼科其下仅有一属：

Solenostomus, also known as ghost pipefishes, false pipefishes or tubemouth fishes, is a genus of fishes in the order Syngnathiformes. Solenostomus is the only genus in the family Solenostomidae, and includes six currently recognized species. Ghostpipefishes are related to pipefishes and seahorses. They are found in tropical waters of the Indian Ocean, from Asia to Africa.