Brown trout, sea trout, halibut and Arctic charr are also farmed in Scotland. Another species that exhibits MHC-associated cryptic choice is the Arctic charr "Salvelinus alpinus". Furthermore, both the Atlantic salmon and the Arctic charr have experienced changes in abundance. Consequently, Arctic charr have been referred to as the 'most variable vertebrate on Earth'. Haye was due to fight Manuel Charr at Manchester Arena on 29 June 2013. Lake Sommen is home to a subspecies of charr called Sommen charr (). On 25 June Williams suffered a TKO defeat against Manuel Charr. USS "Charr" fired four torpedoes, hitting "Isuzu" portside twice near the aft engine room. May. Povetkin claimed the vacant WBC International title after stopping Charr in 7 rounds. The perpetrator, whom Charr identified to police, turned himself in to police. In round 7, Povetkin landed a three-punch combination which dropped Charr, flat on his back. Charr underwent double-hip replacement surgery in May 2017.