Because it just doesn't happen.
False.
Deep current is a movement of the ocean water. The ocean waters current is continuous.
Yes of course. Photosynthesis need light to take place. Light does not reach very deep.
The aphotic zone is permanently dark. Organisms would need to be able to manufacture and obtain food without photosynthesis.
it is very deep
To the very deep ocean.
it can go very deep
Yes, squid live in the ocean. They live very deep under the water.
A long narrow and very deep canyon where the ocean floor bends down toward the mantle is called an ocean trench. This is caused by two plates pulling apart.
Their shape. The ocean rarely slopes off gently to a deeper and deeper depth. All of the "trenches" in the ocean are sudden, very deep "vees". In other words: trenches.
Marine algae are photosynthetic. At depths below 200m there is very little sunlight which would make photosynthesis extremely difficult.
A long narrow and very deep canyon where the ocean floor bends down toward the mantle is called an ocean trench. This is caused by two plates pulling apart.