Can deckhands fish in the dark sea? (Legendary Scale Farming)

Since the fishing rate with artifacts can be pretty nice, and massive fish can be caught in certain ranges of the dark sea, is it possible to farm legendary scales this way?

Yeah they can fish if I’m not wrong, but it’s not deckhands with increased speed, it’s pretty much the entire crew (if there is one equipped)

they can’t catch massive fish (unless that was changed in full release)

yeah like Iris said, afaik the game doesnt recognize if your ship is in the dark sea or not for fishing purpose and your crew wont catch massive fish
didnt test myself though