Agonus is a monospecific genus of ray-finned fish belonging to the subfamily Agoninae in the family Agonidae.

Its only species is Agonus cataphractus, commonly known as the hooknose, pogge or armed bullhead.

Agonus was first proposed as a genus in 1801 by the German naturalists Marcus Elieser Bloch and Johann Gottlob Theaenus Schneider.

[4] The genus Agonus is now regarded as monotypic and is classified within the subfamily Agoninae in the family Agonidae.

[2] Agonus feeds on small crustaceans, molluscs, brittle stars and worms.