Reg is the entrance guard for the Salty Spitoon. Reg lets people into the club by showing him how tough they are. He lets Sandy in, but SpongeBob is not able to enter because he is not tough enough.
Reg is a brown, muscular fish with purple lips and a green headband. Reg also has a bald head. He has a tattoo of a heart that said MOM, but Sandy, who was trying to show how tough she was, turned it into "WOW" by ripping the tattoo off Reg's chest and turning it upside down.