Leather can be made from almost any skin and that includes making fish skin leather. It might be difficult to imagine fish skin as leather because the skin is very thin, but it is very strong and has good water resistant qualities.
Fish skin leather is made from skins of non-endangered fish species including salmon, shark, carp, bass, sturgeon and catfish. The art of making leather out of fish skin, is an ancestral craft, which has almost been lost due to industrial techniques that have taken over in leather production.
