fiddler

noun

1. One who plays the fiddle.
2. One who fiddles.
3. 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.
4. The common European sandpiper (Actitis hypoleucos); so called because it continually oscillates its body.