Assertion: halibut's eye | /r/CapableOf | end up on same side of their head
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Source sentences:
text: While halibut are born with an eye on each side of their head, as they grow, one eye migrates so that both eyes end up on the same side of their head (on the upper side), which enables them to see predators and prey better as the halibut lay camouflaged on the sea bottom.