Question: osrs how to get to sand crabs?
Answer: Use a Falador teleport, or Amulet of Glory to teleport to Draynor.
Run to Port Sarim and speak to Veos on the north-eastern part of the dock. ... 
Once you arrive on Zeah, run west off the dock, then all the way south to the beach.
You will find Sand Crabs all throughout the southern beach area.