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 Although originally made exclusively from sturgeon, especially beluga, in 1795 an invention by William Murdoch facilitated a cheap substitute using cod.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
Fish in the Trap to take up swimming. The two eventually become involved in a relationship. However, the swim captain's old gang isn't so keen on this new boy who is constantly occupying their friend's time and thoughts. Matsui's own friend is against the relationship, as well. Jonathan Clements and Helen McCarthy describe the OAV as being a funny "school shenanigans" story. Fish in the Trap The series begins when a five-year-old boy named Matsui Takahiro is playing with his friend Teru and his dog; suddenly, they both notice a blue-haired young man staring at them named Yuuji. Matsui doesn't know him but is