Get to the fish market early. Early in the morning and early in your trip. Early in your trip because then the jet lag is still on your side. you are awake at 4am anyway. might as well go to the fish market. Early in the day, because now they require a pass to see the actual auctions and it is first come first serve. the tickets are available at 5:15. I got there at nearly 7. Sold out. So I wandered the outer market instead. Luckily I was able to see the auctions last trip.