Acanthonemus (from Greek: ἄκανθα akantha, 'spine' and Greek: νεμω nemo 'to distribute' or 'covered')[2] is an extinct genus of prehistoric marine ray-finned fish that lived from the early Eocene.

[1][3] It contains a single species, A. subaureus (synonyms: A. bertrandi Agassiz, 1834, A. filamentosus Agassiz, 1834), known from the famous Monte Bolca site in Italy.

It is the only genus in the extinct family Acanthonemidae.

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