Shown here is a mechanical sculpture titled Ferrum Fish. The piece is made of oak, lime, copper, forge steel, glass, sea shells, and other materials. From what I gather, this mechanical fish and several others like it were created by a collective of artists that go by the name Art Mechanicus or perhaps ArtMechanicus.
Sorry I can't say more about this amazing mechanical sculpture. The site is in Russian. At least I think it is; I simply can't read it.
Whatever the language, there are more photographs and videos to see if you head on over the ArtMechanicus.com.
[ Thanks David! ]