Until about 130 years ago, residents of the Gilbert Islands, which make up much of the Republic of Kiribati in the Pacific Ocean, used teeth from dusky sharks (Carcharhinus obscrus) and spotfin sharks (Carcharhinus sorrah) to make swords, spears, daggers and other fearsome weapons. Today, spotfin sharks can be found near Australia and Indonesia, and dusky sharks can be spotted near Fiji — but neither plies the waters around Kiribati.