(CNN) It's a shark-eat-shark world, as an Australian fisherman discovered this week.

While fishing for small shark off the coast of New South Wales, Trapman Bermagui, also known as Jason, hooked a bronze whaler shark, which was promptly eaten by a colossal mako.

Before the huge shark could be hauled in, however, it fell prey to an even bigger creature, which devoured all but the mako shark's head.

"We didn't see what ate the mako," Jason told CNN, estimating that the intact shark would have weighed "at least" 250 kilograms (550 pounds). The head alone weighed about 100 kilograms (220 pounds), he said.

When the crew cut the meat from the mako's head, they found another surprise: the detached bill of a marlin, embedded into the flesh, which Jason speculated was the result of "a battle years ago." The find highlighted the "amazing healing powers of the shark," he wrote on Facebook

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