鮪釣り[magurotsuri] tuna fishing
梶木鮪[kajikimaguro] marlin
黒鮪[kuromaguro] Pacific bluefin tuna (edible fish, Thunnus orientalis)
鮪女[maguroonna] woman who lies flat during intercourse
葱鮪[negima] dishes based on spring onions and tuna

本鮪[honmaguro] Pacific bluefin tuna (edible fish, Thunnus orientalis)
黄肌鮪[kihadamaguro] yellowfin tuna (Thunnus albacares)
大西洋黒鮪[taiseiyoukuromaguro] northern bluefin tuna (Thunnus thynnus)
葱鮪鍋[negimanabe] stew based on spring onions and tuna

お歯黒[ohaguro] tooth blackening
暗黒期[ankokuki] eclipse period
暗黒時代[ankokujidai] Dark Ages
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
黒い[kuroi] black

黒い霧[kuroikiri] thick fog
黒くする[kurokusuru] to blacken
黒ずむ[kurozumu] to blacken
黒っぽい[kuroppoi] dark