He survived Tibullus (died 19 BC), but was no longer alive when Ovid wrote (c. 12 AD) the epistle from Pontus (E Ponto, iv.16) containing a list of poets. He was the author of a collection of epigrams called Cicuta ("hemlock") for their bitter sarcasm, and of a beautiful epitaph on the death of Tibullus; of elegiac poems, probably of an erotic character; of an epic poem Amazonis; and of a prose work on wit (De urbanitate).
Martial often alludes to Marsus as one of his predecessors, but he is never mentioned by Horace, although a passage in the Odes (iv. 4, 19) is supposed to be an indirect allusion to the Amazonis (M. Haupt, Opuscula, iii.332).
See JA Weichert, Poetarum latinorum vitae et reliquiae (1830); R Unger, De Dom. Marsi cicuta (Friedland, 1861).