The huge left pincer of the Tropical Fiddle Crab looks terrifying to an enemy! It is not used in hunting or

even in feeding but used only to find a suitable female to mate!

At the breeding time, the colorful male moves its giant claw back and forth in a sawing motion-very much

like the action of a violinist. Of course no music will be produced!

But this silent and colorful serenade mesmerizes the plain and drab female – which does not have a claw.

She slides into the male’s burrow-accepting his invitation!