why are eyes of fish always open
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Explanation:
Fish do sleep with their eyes open, because they don't have eyelids (except for some sharks) to close! ... Most fish need to keep moving even when they're sleeping, so that they keep a constant flow of water moving past their gills to maintain a proper oxygen level in their bodies.
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Answer:
Fish do sleep with their eyes open, because they don't have eyelids (except for some sharks) to close! ... Most fish need to keep moving even when they're sleeping, so that they keep a constant flow of water moving past their gills to maintain a proper oxygen level in their bodies.
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