Some also spawn in the waters off Japan. Motherly love Bluefin tuna lay millions of eggs at a time, and their roes can weigh over ten kilos. To protect the eggs in their inflated abdomens, the females have many layers of fat. In recent times in Taiwan, "tuna belly" has become another word for a beer belly.
充滿母愛的鮪魚肚黑鮪媽媽每回產卵超過百萬個，挺著河豚般的肚子，卵巢重可達十公斤以上，為了保護層層疊疊的魚子，「鮪魚肚」上自是少不了媲美三花五層肥豬肉的脂肪，黑鮪魚「聲譽鵲起」之後，近來鮪魚肚更成為形容人啤酒肚的專有名詞。