In Sydney, the current Fish Market is a grotty assemblage of small warehouses in what's now a prime waterfront location of the city that has become an unlikely tourist attraction, but still serves the wholesale market. They're building a new one right next to it that looks far nicer, leaves tourists much less at risk of getting impaled by a speeding forklift, and will keep the wholesalers around for at least some time since they've been promised fixed rents for the next X years: https://newsydneyfishmarket.insw.com/insw/new-sydney-fish-ma...
All other markets, though, have been shipped off to a massive complex in the industrial suburbs, designed for wholesalers with easy truck access, and with the arguable exception of Paddy's Markets (which mostly sells junk to tourists) there's not a single proper consumer retail market in the entire city. Meanwhile, over in Melbourne, there's a whole slew of them (Queen Vic, Prahran, Footscray etc) that all appear to be thriving.