Refers specifically to the young stage of the striped mullet (Mugil cephalus), known as ぼら in Japanese. Used in fishing and culinary contexts.
See also: ボラ (ぼら)
Young striped mullet caught at this time of year is delicious as sashimi.
The fisherman found a school of young striped mullet.
Kanji spelling; rare and mostly replaced by kana. The kanji 洲 (sandbank) and 走 (run) are used here, but the word is usually written in kana.
Variant kanji spelling using 州 instead of 洲; even less common.
Irregular okurigana variant; rarely used.
Katakana spelling, sometimes used for emphasis or in informal contexts.
The origin is uncertain. Possibly from 洲 (す, sandbank) and 走り (はしり, running), referring to the fish's behavior near sandbanks, but this is speculative.