Fiddler /(?)/

Fid·dler

Fiddler

n.
  1. One who plays on a fiddle or violin.
  2. A burrowing crab of the genus Gelasimus, of many species. The male has one claw very much enlarged, and often holds it in a position similar to that in which a musician holds a fiddle, hence the name; -- called also fiddler crab, calling crab, soldier crab, and fighting crab. (Zool.)
  3. The common European sandpiper (Tringoides hypoleucus); -- so called because it continually oscillates its body. (Zool.)

Phrases & Compounds
Fiddler crab
See Fiddler, n., 2.