Isinglass 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 a bladder, or German "hausen blas", meaning essentially the same. Although originally made exclusively from sturgeon, especially beluga, in 1795 an invention by William Murdoch facilitated a cheap substitute using cod. This was extensively used in Britain in
The Tale of the Fisherman and the Fish about the golden fish, she gets angry and tells her husband to go ask the fish for a new trough, as theirs is broken, and the fish happily grants this small request. The next day, the wife asks for a new house, and the fish grants this also. Then, in succession, the wife asks for a palace, to become a noble lady, to become the ruler of her province, to become the tsarina, and finally to become the Ruler of the Sea and to subjugate the golden fish completely to her boundless will. As the man goes to ask for