GR translation: their breaths foul with hours-old fish

[Mike Jing]

P52.26-32   Yet for all his agonizing all Pointsman will score,
presently, is an octopus—yes a gigantic, horror-movie devilfish name
of Grigori: gray, slimy, never still, shivering slow-motion in his
makeshift pen down by the Ick Regis jetty . . . a terrible wind that
day off the Channel, Pointsman in his Balaclava helmet, eyes freezing,
Dr. Porkyevitch with greatcoat collar up and fur hat down around his
ears, their breaths foul with hours-old fish, and what the hell can
Pointsman do with this animal?

Does this mean they have eaten fish a few hours ago?