The genus is classified within the tribe Scorpaenini in the subfamily Scorpaeninae of the scorpionfish family Scorpaenidae. The genus name Idiastion is the Greek word meaning "hermit" or "recluse", alluding to the rarity of the scorpionfishes at the depths at which Idiastion was collected from.
The genus Idiastion is categorized within the tribe Scorpaenini in the subfamily Scorpaeninae of the family Scorpaenidae. The name "Idiastion" derives from Greek, signifying a hermit or recluse, underscoring the rarity of scorpionfishes found at deep depths.