formalin

Formaldehyde (gas) dissolved in water, used as preservative for specimens of fish stored in collections of museums or universities. Prevents decay bacteria from destroying the body of a specimen. For long term storage of specimens ethanol is used.

Literatur

Coad, Brian & D.E. McAllister. 2007. "Dictionary of Ichtyology". Brian W. Coad. Retrieved on June 21, 2014, from:http://www.briancoad.com/Dictionary/Complete%20Dictionary.htm - (ffm06223)

Wikipedia