Japanese armorhead
A species of marine fish (Pentaceros japonicus) found in Japanese waters. The name is typically written in katakana, as is common for fish names.
The Japanese armorhead is a deep-sea fish and is not commonly found in markets.
Katakana spelling is standard for this fish name; usually written in kana.
Hiragana spelling is also used, though katakana is more common for fish names.
Kanji spelling exists but is rarely used; the word is usually written in kana.
The name likely derives from 壺 (tsubo, 'pot') and 鯛 (tai, 'sea bream'), referring to its shape, but the exact origin is uncertain.