TIL an Islandic company named Kerecis makes skin grafts from fish skins (of North Atlantic cod caught in Icelandic waters). The fish-skin graft is approved by the FDA as well as European regulatory authorities

https://www.greenbyiceland.com/circular_story/kerecis/

https://www.reddit.com/r/todayilearned/comments/153zcgq/til_an_islandic_company_named_kerecis_makes_skin/