Dagonodum is an extinct genus of ziphiid cetacean known from Tortonian age marine deposits in the Gram Formation in Denmark.

The species name is a reference to the word for "goodbye" in the local South Jutlandic dialect where the fossils were found.

[1] The species is distinguished by its two pairs of mandibular tusks and long snout.

It also possessed a long neck, leading to speculation that it wasn't well suited to deep-dives.

[1] The species is notable for its difference from other ziphiidae of the period in that it seems to be less reliant on suction feeding.