i have fish i want to perserve?not sure how?just need them in a jar,but i don't want them to smell or lost Any Any color to them.They are very brigthly colored,and them i have tried decolored them?is glyerin he way to go
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There are few ways to preserve the living color once a fish dies. Distinctive patterns may remain intct in fixed and preserved specimens, but most fish that are wet preserved eventually bleach out and then become a pale sickly orange/brown.
Some of the newer siliconizing methods seem to preserve color better than wet processes, but that is not something you can do without a lot of specialized equipment.
I've found that living fish or fresh dead fish will hold color for quite a while when placed in a strong detergent bath, but once they are fixed and preserved, that phenomena ceases.
Glycerin won't solve the problem. Your best bet would be to have the fish freeze-dried and then either paint the colors back yourself, or have a competent taxidermist do the job.