slender sunfish; oblong sunfish
A species of sunfish (Ranzania laevis).
The slender sunfish inhabits warm seas around the world.
Katakana spelling is standard for this fish name; usually written in kana.
Kanji spelling is rare and mainly encountered in specialized contexts.
The name combines 楔 (くさび, 'wedge') and 河豚 (ふぐ, 'pufferfish'), likely referring to its wedge-like body shape.