30/01/2016 2:39 AM AEDT

Shark Slowly Eats Rival In Brutal Aquarium Attack

The sand tiger spent 21 hours chowing down on its victim.

Forget dog-eat-dog, it's a shark-eat-shark world in South Korea.

Other sea creatures at the COEX Aquarium in the capital, Seoul, must be shaking in their tanks after a sand tiger shark devoured her male rival.

Video footage shows the 7.2 foot eight-year-old slowly chomping down on the 3.9 foot banded houndshark inside the attraction's Ocean Kingdom and Underwater Tunnel exhibit on Thursday night.

The slaying came after a tank turf war escalated between the pair, according to Sky News.

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The sand tiger shark feasted on her opponent for 21 hours.

"Sharks have their own territory," Oh Tae-youp, the aquarium's PR manager, told Reuters. "However, sometimes when they bump against each other, they bite out of astonishment."

The attacker feasted on her five-year-old tank mate for 21 hours, before appearing with just the tip of his tail dangling from her mouth.

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Sand tiger sharks can grow to 10.5 feet long in the wild.

But the BBC reports she wouldn't actually be able to digest her prey. Instead, she would regurgitate the butchered male within the next week.

Sand tiger sharks are known to feast on their weaker siblings while still inside their mother’s womb.

In the wild, sand tiger sharks can live for 15 years or more, weigh up to 350 pounds and measure 10.5 feet long. They are found in warm waters across the world, apart from the eastern Pacific, and listed as a threatened species.

Adult banded houndsharks, meanwhile, grow to just 4 foot and weigh around 40 pounds.

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