The Sydney Fish Market’s 36-Hour Seafood Marathon begins bright and early and continues until Christmas Eve. It’s the most wonderful time of the year—when Sydneysiders are able to buy fresh prawns, clams, and lobsters in the dead of night. The Sydney Fish Market’s annual 36-Hour Seafood Marathon will begin at 5 a.m. on Thursday, and retailers won’t be packing up until 5 p.m. on Christmas Eve. The fish bonanza has been running every year at the iconic markets at Sydney’s Blackwattle Bay for more than two decades. The event usually attracts 100,000-plus customers, purchasing more than 370 tonnes of seafood. Sydney Fish Market CEO Greg Dyer said the marketplace is expecting high visitor numbers and people should plan ahead. Early birds catch the fish, with the first four hours of the marathon usually one of the quietest times to drop by. The hours between 4 p.m. and 6 p.m. on Dec. …