Opsariichthys bidens, the Chinese hooksnout carp, is a species of freshwater fish in the family Xenocyprididae. It is endemic to fast-flowing streams and rivers of East Asia (China, Japan, North Korea, South Korea, and Russia) and mainland Southeast Asia (Laos and Vietnam). A mid-sized minnow, it has a maximum length of 21.9 centimetres (8.6 in) and a maximum published weight of 58.4 grams (2.06 oz), with sexual dimorphism favoring larger males.

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