Schoolgirl Rhiannon Halling's tussle with a monster mako shark three times her size has earned her ultimate bragging rights.Not only has the 11-year-old outdone her father Mark in the big fish stakes, her name has also been etched into the record books, after the 118.1kg catch was officially certified as a world record."When I saw it come up next to the boat I was shocked, I couldn't believe how big it was," Rhiannon said."I was puffed and my arms were really sore but I was really happy to have caught my first shark."The haul came while she was fishing in the family's boat 50km off the Illawarra coast in November.The gentle sound of the sea was suddenly broken by the squeal from Rhiannon's fishing rod reel, as the shark hooked up and headed for the ocean depths.The initial burst of energy from the end of the line indicated a massive fight ahead for the Warilla girl.Incredibly, the battle lasted just 15 minutes, before a family friend was able to secure the fish and pull it aboard the boat."The mako shark is a very aggressive fish, and they will often come back to bite the boat, and that's what happened here," her father Mark Halling said."Because of that, Rhiannon only had to battle with it for 15 minutes when it could have potentially been hours."For her efforts, Rhiannon is the proud bearer of an official world record for her age division, as well as a swag of NSW and Australian records.Amazingly, the catch was made during only her second venture out into open waters.Mr Halling said the family had to go to great lengths to confirm the world record, which had taken considerable time."We had to weigh the shark on certified scales, get measurements and take pictures of the teeth," he said."Then we had to submit a length of the line used to the International Game Fishing Association in Florida, where they verify everything."Rhiannon caught the shark on a 6kg line, and was completely unaided, qualifying for the record.