Taxonomy

Tachypleus tridentatus Leach, 1891. OTHER COMMON NAMES

English: Eastern horseshoe crab, three-spine horseshoe crab PHYSICAL CHARACTERISTICS

The Japanese horseshoe crab has a large body and relatively small compound eyes. Males average approximately 20 in (51 cm) in length, and females are approximately 23.6 in (60 cm) long. The prosomatic carapace is domed. The opisthosomatic carapace is hexagonal but not strongly elongated, and spines protrude from its margins. This horseshoe crab is greenish gray.

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