Lewis & Short

salsāmentārĭus, a, um, adj. [salsamentum], of or belonging to salted fish: vasa, Col. 2, 10, 16: cadi, Plin. 18, 30, 73, § 308: testa, id. 28, 9, 37, § 140: NEGOTIANS, a dealer in salted fish, Inscr. Orell. 4249.
As subst.: salsāmentārĭus, ii, m., a dealer in salted fish, Auct. Her. 4, 54, 67; Suet. Vit. Hor. init.