It seems to be a crab of the Geryonidae family. It could be Chaceon or Geryon. Do you know the depth where it was found? They are usually from depths between 200 and 2000 m. Good luck.
Please contact Dr. Reza Naderloo, University of tehran. He works extensively on crabs of Persian Gulf. He is on researchgate : https://www.researchgate.net/profile/Reza_Naderloo.