Fishwife
/ˈfɪʃwaɪf/
Definition 1 of 2
Pro Tip 1/3Literal Meaning
Focuses on the actual job of selling fish, not personality traits. 
The fishwife set up her stall at dawn.
Pro Tip 2/3Gender Specific
Traditionally refers to females; rare to use for men. 
A fishwife has been operating at this market for decades.
Pro Tip 3/3Historical Occupation
It's an old term; modern use might sound outdated. 
My grandmother was a proud fishwife in her village.