Meaning & use
aphotic zone
Last updated
Meaning
nounsingular
The deep part of a sea or lake that receives no sunlight and where photosynthesis cannot occur.
Grammar: Used with the definite article: the aphotic zone. It can also be countable in scientific writing.
Patterns
- the aphotic zone
- in the aphotic zone
- below the aphotic zone
Many deep-sea creatures live in the aphotic zone, where no sunlight reaches.
Scientists study the aphotic zone to understand how life survives without photosynthesis.
The aphotic zone begins below the depth where light can penetrate.
Common combinations
- the deep aphotic zone
- The deep aphotic zone is home to strange fish with large eyes.
- extend into the aphotic zone
- The ocean floor extends into the aphotic zone, far from any light.
- aphotic zone organisms
- Aphotic zone organisms rely on falling food particles from above.
Synonyms and how they differ
- dark zone
- A less technical term for the same region; 'aphotic zone' is more precise in scientific contexts.
- deep sea
- Refers to the deep parts of the ocean generally, not specifically the sunless layer.
Opposites
Word family
Commonly confused: aphotic zone or photic zone?
aphotic zone vs photic zone
The photic zone is the upper layer where sunlight penetrates and photosynthesis happens. The aphotic zone is the opposite: it gets no light.
Practice
Which sentence uses 'aphotic zone' correctly?
Choose one answer.
The aphotic zone is the deep layer without sunlight, so option 1 is correct. Option 0 describes the photic zone, and options 2 and 3 are unrelated.
Make it your own
Write a sentence using “aphotic zone”, then check it and compare it with the examples above.