Atlantic bluefin tuna; northern bluefin tuna
Scientific/common name for Thunnus thynnus. Often written in katakana as タイセイヨウクロマグロ.
The Atlantic bluefin tuna is designated as an endangered species.
Atlantic bluefin tuna is traded at high prices as a sushi ingredient.
Kanji spelling; usually written in kana.
Katakana spelling, often used for species names; this word is usually written in kana.
Compound of 大西洋 (たいせいよう, 'Atlantic Ocean') + 黒鮪 (くろまぐろ, 'bluefin tuna'). The exact derivation is straightforward; the kanji 黒鮪 literally means 'black tuna'.