FISH GLUE
fish glue: translation
1) isinglass (the glutinous or gelatin-like fluid prepared from the collagen of the outer layer of gas bladders of sturgeons or other fishes. Used in clarifying wines and beers, for jams and jellies, in printing inks and as an adhesive cement)
2) a liquid glue made from the bones, fins and skin of fish by heating in water, used cold for bookbinding, for example