middle-sized Japanese amberjack
Refers to a young yellowtail (Seriola quinqueradiata) of intermediate size, typically around 40–60 cm. In the Kantō region, this name is used for fish at this growth stage, distinct from smaller 'hamachi' and larger 'buri'. Primarily a culinary and fishing term.
See also: ブリ
Warasa at this time of year are fatty and delicious.
I target warasa on a fishing boat.
Katakana spelling is common for this fish name, especially in culinary and fishing contexts.
Hiragana spelling is also used.
Kanji form is rare; the word is usually written in kana.
The name is regional (Kantō) and refers to a specific growth stage of the yellowtail. The exact origin of the word is uncertain.