Arctic wrack; Fucus evanescens
A species of brown algae found in cold northern waters. The Japanese name is typically written in katakana as ヒバマタ.
Arctic wrack is a brown alga commonly found on Arctic coasts.
Kanji spelling is rare and may not be widely recognized; the katakana form is preferred.
The name likely derives from 檜葉 (hiba, 'hinoki cypress leaf') and 叉 (mata, 'fork'), referring to the forked, leaf-like shape of the alga. The exact historical derivation is uncertain.