河蟹。通稱“螃蟹”，也稱“毛蟹”、“絨螯蟹”等。甲殼綱，方蟹科。肉味鮮美，為我國產量最大的淡水蟹類之一。因捕蟹所用閘門而名。

Hairy crab; the Chinese mitten crab; to describe a situation where one has money tied up in shares that have made a big loss in the trading market