Bottom Quote by James Dwight Dana
![“Are coral reefs growing from the depths of the oceans? ... [The] reply is a simple negative; and a single fact establishes its truth. The reef-forming coral zoophytes, as has been shown, cannot grow at greater depths than 100 or 120 feet; and therefore in seas deeper than this, the formation or…” quote by James Dwight Dana](https://sms4smile.com/quotes/img-quotes/0db/james-dwight-dana-34629_bottom_are-coral-reefs-growing-from-the-depths_1275581.jpg)
“Are coral reefs growing from the depths of the oceans? ... [The] reply is a simple negative; and a single fact establishes its truth. The reef-forming coral zoophytes, as has been shown, cannot grow at greater depths than 100 or 120 feet; and therefore in seas deeper than this, the formation or growth of reefs over the bottom is impossible.”
About This Quote
Source Book: Manual of Geology, 1863
Coral reefs cannot form below about 100‑120 feet because the organisms need sunlight.
In simple terms: Reefs need light, so they’re limited to shallow water.
Key Takeaway
Protect shallow marine habitats.
Themes
marine biology
environment
science
Mood
informative
scientific
Type
educational
explanatory
When to use this quote
- conservation planning
- marine research
- education
- policy making
Key Concepts
photosynthesis
habitat limitation
Questions to Reflect On
- How does depth limit coral distribution?
- What can be done to protect shallow reefs?
A Different Perspective
Does not address deeper‑water ecosystems that may host other life forms.
