Two Delaware beach restaurateurs have taken the reigns at Nick's Fish House & Grille in Port Covington. Steve "Monty" Montgomery, who owns Starboard Restaurant in Dewey Beach, Del., and Jim Weisgerber of Bethany Blues BBQ in Bethany and Lewes, Del., are taking over the South Baltimore restaurant - now simply called Nick's Fish House. The property at 26000 Insulator Drive is the latest to change hands in an area that has seen more than $90 million of investment in the last year, as the Baltimore…