Isinglass advantageous in situations where minimal use of water is desired for the parchment as the isinglass can be reactivated with an ethanol-water mixture. It also has a greater adhesive strength than many other adhesives used for parchment repair. Isinglass Isinglass () is a substance obtained from the dried swim bladders of fish. It is a form of collagen used mainly for the clarification or fining of some beer and wine. It can also be cooked into a paste for specialised gluing purposes. Its origin is from the obsolete Dutch "huizenblaas" – "huizen" is a kind of sturgeon, and "blaas" is
Piracy off the coast of Venezuela 2017, piracy grew in Lake Maracaibo, with bandits attempting to rob and kill boaters in the area for their possessions. Croakers, valuable fish caught in the waters that contain swim bladders rich in collagen, are often targeted by pirates in the area to be sold in international markets. The Bolivarian Navy of Venezuela, according to locals, rarely patrols the waters. Pirates would also strip equipment from PDVSA oil facilities near Lake Maracaibo's waters. In total, 71 incidents of piracy occurred in Venezuelan waters according to OBP, a 163% increase. Reports of Venezuelan pirates attacking luxury yachts in the Caribbean began