One crab claw in a glass bottle.
These crabs were all washed onto the shore after a storm, and this is all that's left after the gulls had has their fill.

Crab uses :

Also used to help you head in a new direction.
With the use of the crab, you can swim deep into your inner world to discover your true self. Crabs navigate these waters easily. 
Crabs are considered good luck.
Claws are used for protection in most branches of magic.
Perfect to add to a witch jar or use as a stand alone object on your altar. 

Crab claw in bottle