TMZ-- Mike "The Situation" Sorrentino got arrested yesterday for brawling with his brother at their tanning salon they own together, Boca Tanning Salon in Middletown, NJ.

Police received a phone call reporting a fist fight in the salon. When officers arrived, The Situation was arrested with assault charges and a giant black eye.

The Jersey Shore star posted $500 bail and left the jail saying that he and his brother Frank had a disagreement on how to run the business.

(photo credit: TMZ)

(photo credit: TMZ)