The following photographs show a mating pair of the horseshoe crab Carcinoscorpius rotundicauda swimming in a stream near the mouth of the Tai Ho Stream, Lantau, Hong Kong on 7 June 2012.
Undisturbed streams, particularly in their lower reaches are critical to horseshoe crab ecology in Hong Kong, because horseshoe crabs use stream courses to navigate across beaches and both T. tridentatus and C. rotundicauda have been observed to spawn in the lower reaches of streams in Hong Kong.
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