Why do you think the tide pool has a much higher oxygen content then the ocean at 6: 00 pm and then a lower one at 6: 00 am?

The waves of a seashore hit the sand, because of the moon the tide lowers and rises. when it lowers the tide pool only has some water and a lot of oxygen when the tide rises it has less oxygen.

The ocean is to powerful
At 6:00 b cause it active more

The light is great source of energy