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Preserving fish

Discussion in 'Setup and Filtration' started by davo, May 22, 2007.

  1. davo

    davo
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    I was looking into preserving fish.... you know the dead specimen in a formaldehyde filled jar. Well, as i think thats a carcenogenic(?) what would be used as a substitute that i would be able to access and not have to do anything special to have. Would it be part ethanol/proponol or mixed with something? I heard of using a 70% ethanol solution with something else.

    Anyway ideas :confused:
     
  2. wizzin

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    I have a huge container of formaldehyde :naughty: However, I think you can use a strong mixture of pickling salt and borax. Don't know what the water would look like after a while though :uhoh: :yuck: It would definitely prevent decomposition though.

    I think alcohol would work too. Have fun :D
     
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  3. steveprovot

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    my friend once found a oppossom mom that died and he put the dead babies in alcohol and its lasted well over 5 years i didthe same with still-born rat pups and they lasted years. my fiance has a kidney and heart from a disection of a cat in high school that was in 04 they are still fine. so long story short use alcohol like you clean cuts with it will last forever
     
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  4. Horiyoshi III

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    I would get 100% Ethanol not Isypropyl,Isypropyl is a wood alchohol and i don't think it would be good.100% Ethanol i have no idea how you would get it,but im shure it would stay clear forever and not disintergrate specimens.
     
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  5. Polypterus

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    The general process for alcohol fixing a specimen is to first soak in 25% ethanol for a week or so, Take it out and then soak in 50% ethanol for a week or so then remove and place in the final solution of 70% to 80% ethanol.

    ethanol concentration is always diluted with distilled water.
     
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  6. beblondie

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    Preservation
    I use 70% alcohol for preservation (or at least maintenance of perservation) of our specimens...this is diluted from the 95% stuff we keep on hand in the lab. the actual preservation/fixation, however, is done with formaldehyde. if the fish is larger than just a few inches then i cut the belly so the chemical can enter into the insides of the fish and preserve everything. the fish stays in the form. solution for a couple days. if its a gar or bichir, a fish that has rigid bony scales, then i take the fish out after 2-3 days and just let it air dry. the fish is now dry preserved.

    if im doing a standard preservation i take the fish out after 2-3 days and let it sit in a container of water to soak out the formalin. after a day in the water the fish is removed and placed into a container of 70% alcohol for long-term preservation.
    as far as using other alcohol, i think as long as its relatively pure and the proof is about 140 you should be ok...in theory
     
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  7. CHOMPERS

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    I think everyone has had dead oppossum babies in a jar. I am not sure if I still have mine. They will last forever in rubbing alcohol.
     
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  8. Fabio's Dad

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    I use 70% for all sorts of things like spiders, fw fish, midgets. But I've never been successfull with sw fish with that method.
     
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  9. Fabio's Dad

    Fabio's Dad
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    Annie the Sun Conure

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    I was just being silly. However, as I read that last post, I realized that it may have been quite offensive to many people. I'm really sorry if anyone was offended by that.
     
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  10. CHOMPERS

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    SW fish are ok if you are going to eat them later. Fw fish will taste funny. Midgets are too stringy...
     
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