Japanese angelshark is eaten and the rough skin is made into a type of leather called shagreen for use in wood finishing. Angel sharks in general are highly threatened by commercial trawl fisheries due to their susceptibility to capture and low rate of reproduction, and angel shark species elsewhere are known to have declined markedly under fishing pressure. Trawling activity in the Yellow Sea and other parts of the northwestern Pacific is intense and, coupled with pollution, has had a serious impact on the local ecosystem. The Japanese angelshark population is suspected to have declined by up to 50% or more under
The Shagreen Bone role. The soundtrack contained the "entr’acte" and some of his other works: "The Song about Death No.1" and "Mechanics of Thought Movement" (from the cycle "Public Songs", Op. 34). The film choreographer and scenographer was Andrey Bosov, the leader of the youth group of the Kirov Ballet. "The Shagreen Bone" is written in the genre of "tendentious classical ballet" or "ballet with comments." Paradoxically, it was Ludwig Minkus's "Don Quixote" and Eric Satie's "Parade" which served as reference for the composer. When working on the ballet libretto Khanon noticed how "hastily and carelessly this novel was written." Throughout the text