Chinese puffer; Takifugu chinensis
A species of pufferfish found in East Asian waters. The name カラス is used in Japanese fish markets and cuisine contexts.
The Chinese puffer is a type of pufferfish and is also known as an edible fish.
Katakana spelling is standard for this fish name; the kanji form 烏河豚 is rare and gikun.
Gikun kanji spelling; rarely used and may not be recognized.
The name カラス (烏) likely derives from the black coloration of the fish, resembling a crow. The kanji 烏河豚 is a gikun compound combining 烏 (crow) and 河豚 (pufferfish).