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Resident Evil Wiki
Prime universe
(Capcom's primary storyline)

Rat BOWs were a type of bioweapon used aboard a submarine in order to take the craft down by killing all the occupants.

Biology[]

Whilst it is unknown how rats became infected or indeed what with, it's clear that they become far more aggressive and rabid, having a desire to eat flesh as well as attacking creatures far bigger than themselves. Their fur also becomes a lot more mattered and course and their eyes take on a bright red hue.

Due to the amount encountered on the submarine, it is likely that they adapted to multiply from the consumption of human corpses. This is further backed up as we see floods of them coming out of the mouth of one of the submarine's crew.

Purpose[]

The rat BOWs were used to ensure that all personnel aboard the nuclear submarine would be killed, including Leon, Shen and Jason. Whilst most of the crew was indeed killed, the three agents managed to escape in a pod, leaving the sub to self-destruct and destroy all the rat BOWs in the process.

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