A deep-sea rockfish species (Sebastes matsubarae) found in Japanese waters. Also referred to as 赤魚鯛 (あこうだい) in some contexts.
See also: アコウダイ
Matsubara's red rockfish is known as a high-grade fish.
Matsubara's red rockfish is often caught in the deep sea around here.
Katakana spelling is common for this fish name; usually written in kana.
Kanji spelling exists but is rarely used; usually written in kana.
The name likely derives from the reddish coloration of the fish (赤 'red' + 魚 'fish'), but the exact origin is uncertain.