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 Although originally made exclusively from sturgeon, especially beluga, in 1795 an invention by William Murdoch facilitated a cheap substitute using cod.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 Living Planet that have been introduced by humans. This programme concentrates on the marine environment. Attenborough goes underwater himself to observe the ocean's life forms and comment on them at first hand. He states that those that live on the sea bed are even more varied than land inhabitants. Much sea life is microscopic, and such creatures make up part of the marine plankton. Some animals are filter feeders and examples include the manta ray, the basking shark and the largest, the whale shark. Bony fish with their swim bladders and manoeuvrable fins dominate the seas, and the tuna is hailed as