Well before Corey Arnold ever thought about photography, he fished. As a child, he dressed as a fisherman for four consecutive Halloweens, and once brought a dead 3-foot Mako shark to school for show-and-tell. He knew he wanted to be a professional fisherman, even if he didn’t understand what that actually meant.

A eight-metre-long Whale shark swims with other fish in a worlds' largest tank with its front panel size of 8.2 metre x 22.5 metre at the Okinawa Churaumi Aquarium on February 26, 2010 in Motobu, Okinawa, Japan. Japan's most popular aquarium attracts more than 2.5 million visitors per year. (Photo by Koichi Kamoshida/Getty Images)

A Sydney Aquarium diver uses a vacuum to clean the gravel in the Great Barrier Reef tank as a Ray Shark swims by September 26, 2006 in Sydney, Australia. The Aquarium is undergoing its annual spring clean to prepare for the school holidays using vacuums, along with sea creatures like Sea Cucumbers, Sea Urchins, Cleaner Wrasse Fish and Sea Stars to help complete the job. (Photo by Ian Waldie/Getty Images)

Ace Wu searches the deep to photograph stunning underwater creatures. Against their predominantly black backdrops, Wu’s breathtaking subjects glow with sublime vibrancy. In one, a fearsome fish glares at the camera with rows of sharp teeth showing, while in another, a translucent octopus looks like an extraterrestrial. Here: Wunderpus larva. (Photo by Ace Wu/Caters News Agency)

Japanese businessman Kiyoshi Kimura has paid 1.38 million euros ($1.76 million, or 155.4 million yen) for a blue fin tuna – more than three times the previous high – which he also set one year ago. The 222-kilogram fish will be served to Kimura’s customers. Blue fin tuna is annually sold in a traditional New Year’s auction. Japan consumes 80 percent blue fin tuna caught worldwide.

Photo: President of sushi restaurant chain Sushi-Zanmai, Kiyoshi Kimura, displays a 222kg bluefin tuna at his main restaurant near Tokyo's Tsukiji fish market on January 5, 2013. The bluefin tuna was traded at 155.4 million yen (1.77 million USD) at the wholesale market, smashing a previous record. (Photo by Yoshikazu Tsuno/AFP Photo)