The males of this species have one claw that is larger and whiter than the other, which they shake up and down to engage in a courtship behavior known as "waving". Males will sometimes use their large claws to fight each other, and if it breaks their other claw will grow in size to make up for it.
- Scientific Name
- Uca vocans
- Classification
- Order: Decapoda, Family: Ocypodidae
- Habitat
- South of Sagami Bay, China, Vietnam
