Carcinoscorpius rotundicauda. Ha Pak Nai, Hong Kong on 19 August 2009.

The following photographs show a spawning pair of Carcinoscorpius rotundicauda (Mangrove horseshoe crab), in the muddy bank of a stream at Ha Pak Nai, Deep Bay, Hong Kong on 19 August 2009.

The male is visible in the picture. The female is buried above him in the bank of the stream.