About 20 to 30 hours. Don't keep the thawed fish fresh for more than 20 to 30 hours. Due to the food frozen part of the bacteria just be inhibited growth, while there are still some in the low temperature can still reproduce the bacteria, in the thawing of these bacteria will be explosive growth, so after the thawing of the food, the freshness of the period will be greatly reduced, should be consumed as soon as possible to finish.