noun
fiddler crab
Refers specifically to the fiddler crab, especially Uca arcuata. Typically written in katakana as シオマネキ.
干潟でシオマネキが大きなハサミを振っている。
Fiddler crabs are waving their large claws on the tidal flat.
The name しおまねき literally means 'tide-inviter', from the crab's habit of waving its claw as if beckoning the tide. The exact historical derivation is uncertain.