Before a Dec. 6 fishing trip on the local Vagabond sportfishing boat, 63-year-old Mike Livingston had never caught a fish that weighed more than 100 pounds. Now, the retired school administrator from Sunland, Calif. is a world record holder after hauling in a 405-pound yellowfin tuna off the coast of Mexico. “There never was a doubt I would not bring the fish into the boat,” Livingston said. “I knew my knot was going to hold. I have tied the same knot thousands of times.” The record-breaking fish was weighed at Point Loma Sportfishing on Dec. 6. Livingston said it took two hours and 40 minutes to land the fish with the help of the crew. It will be mounted at Lyons and O’Haver Taxidermy in La Mesa.