Meet Rex. He's one of the world's biggest crocodiles and he's been hibernating for the past three months at Wild Life Sydney Zoo.

Not surprisingly, he woke up feeling a bit peckish - and incredible photographs have been taken of staff settling his hunger pangs.

The immense 700kg creature eagerly gobbled up huge beef rib chunks, lowered in by keepers staying a good safe distance away.

rex

Snap to it: Rex is fed huge chunks of beef

Saltwater crocs such as Rex are the biggest in the world and are rightly treated with a huge amount of respect.

They are one of the very few predators in the world that treat humans as prey. They have even been known to kill sharks and tigers.

Their mouths are filled with over 60 extremely sharp teeth and they have a bite force of an incredible 5,000 pounds per square inch, compared to 335 pounds per square inch for a Rottweiler.

Crocodiles are also very quick in the water, being able to swim at 25mph and even over 20mph on land.

They can live up to 80 years, but 99% of crocs are killed by predators in their first year of life.

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  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • AUSTRALIA-ANIMAL-CROCODILE

    A 700 kilogram crocodile called Rex - who is one of the world’s largest crocodiles - cruises around his enclosure after receiving his first feed after emerging from three months of hibernation at WILD LIFE Sydney Zoo on October 3, 2012. Throughout winter, it is common for crocodiles to enter a period of inactivity where they survive on their existing energy stores inside their body but once the weather starts warming up, so does their appetite – to indicate their need to replenish their energy. Rex, who has been a resident of WILD LIFE Sydney Zoo since 2009, was a so-called ‘rogue’ crocodile who was captured and placed into a crocodile farm near Darwin in the Northern Territory when his taste for local pet dogs drew him too close to the human population. AFP PHOTO/William WEST (Photo credit should read WILLIAM WEST/AFP/GettyImages)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles sits in the water prior to being fed at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles sits in the water prior to being fed at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles sits in the water prior to being fed at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles eats beef ribs at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles sits in the water prior to being fed at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)

  • 700kg Crocodile Eats First Meal At Sydney Zoo

    SYDNEY, AUSTRALIA - OCTOBER 03: Rex, one of the world's largest crocodiles sits in the water prior to being fed at WILD LIFE Sydney Zoo on October 3, 2012 in Sydney, Australia. The 700kg crocodile ate his first meal today, after three months in hibernation. (Photo by Cameron Spencer/Getty Images)