spotbelly rockfish
A species of rockfish (Sebastes pachycephalus) found in Japanese waters. The name is typically written in katakana as is common for fish and other organisms.
Spotbelly rockfish are often caught in Hokkaido.
Spotbelly rockfish is delicious when simmered in soy sauce.
Ateji kanji spelling; rarely encountered and mainly of historical or academic interest.
The name ムラソイ likely derives from 斑 (mura, 'spot' or 'uneven pattern') and 曹以 (soi, an old term for rockfish). The exact historical derivation is uncertain.