Your labels should be written on good quality paper in waterproof ink, and placed inside the jar with your specimen. After the period in formalin, the specimens should be allowed to soak in pure water for a few days to remove most of the irritant. They can then be handled safely for identification. The identification should be written on the label and in the collection information. The alcohol should entirely cover the specimen.
Place lids on very securely.
Storage is dependent on your available space and the condition of your finances A few precautions and suggestions are listed below. Make notes on the fishes' coloration before you soak it in formalin. You nay be inclined to sketch the specimen and color the sketch with colored pencils. It will assume the crumpled shape permanently. If the alcohol does evaporate, the snout will be much less damage than the caudal fin.