The only more or less normal fish market in Phuket, but it is not even roughly comparable to the Pattaya market. Do not buy seafood at the entrance, the Cambodians will offer you a lot and shout in your ears, but go to the very end and on the left you will see a shop in the back of which there are huge vats with all kinds of reptiles, there are a couple of Thais who sell it to the whole market - they have the freshest reptiles and the lowest prices.
You can cook in the cafe almost opposite - it has a great view and is very tasty.
I have attached photos of the shop and cafe.
Be sure to visit. Everything is not just fresh, but still alive. We can bargain. They won't give up much, but initially their prices are lower than in other places. They cook right there, in the restaurant opposite.
All the seafood is very fresh and wonderfully cooked. The cafe has everything you need to eat different seafood. Ask for a non-spicy spice, and you won't get hot pepper added to your dishes. And the view from the cafe to the sea