これが故障です：
* Photic zone: This is the uppermost layer of water where sunlight is sufficient for photosynthesis by plants and algae.
* Aphotic zone: This is the deeper layer below the photic zone where light levels are too low for photosynthesis.
The depth of the photic zone varies depending on factors like:
* Water clarity: Clearer water allows light to penetrate deeper.
* Turbidity: Cloudy or murky water reduces light penetration.
* Angle of the sun: Light penetrates deeper at midday than at dawn or dusk.
Let me know if you'd like to learn more about the photic zone or other regions of aquatic environments!
