Frozen hairtail can't be eaten after it turns yellow. The yellow hairtail has actually gone bad. Eating this kind of hairtail will be harmful to human health, so when buying hairtail, you must pay attention to whether it turns yellow or not, and don't eat yellow hairtail.

Why hairtail turns yellow;

Fresh hairtail has a silvery white silver scale on its surface, which is a unique feature of hairtail. This silver scale is made of special fat and has high nutritional value. If hairtail is stored improperly or for a long time, this layer of silver scales will contact with air and undergo oxidation reaction, resulting in yellowing. We can use this to judge whether hairtail has deteriorated.

How to keep hairtail from yellowing;

Keep hairtail in the frozen layer of refrigerator. Don't thaw it halfway. Once thawed, all thawed fish should be cooked and eaten. Or fresh hairtail is cut into sections and then frozen for storage, which is convenient for taking. Even if it is stored in the frozen layer, the hairtail will still turn yellow after a long time, so try not to store it for too long after buying it, and it is advisable to eat it as soon as possible.