Spumy, Spumous adj. Consisting of, containing, or covered with, froth, scum, or foam; frothy; foamy. "The spumous and florid state of the blood.""The spumy waves proclaim the watery war."
... breezes, Weaving plants of the pine conjoined in curve of the kelson; 10 Foremost of all to imbue rude Amphitrite with ship-lore. Soon as her beak had burst through wind-rackt spaces of ocean, While th'oar-tortured wave with spumy whiteness was blanching, Surged from the deep abyss and hoar-capped billows the faces Seaborn, Nereids eyeing the prodigy wonder-smitten. 15 There too mortal orbs through softened spendours regarded Ocean-nymphs who exposed bodies denuded of raiment Bare ... — The Carmina of Caius Valerius Catullus • Caius Valerius Catullus