Where Do 90% of All Marine Creatures Live? Exploring the Ocean's Twilight Zone
Discover where 90% of marine creatures live—in the ocean's twilight zone (mesopelagic zone) between 200 and 1,000 meters deep.
Video transcript
90% of all marine creatures live in the ocean's twilight zone. This zone, also called the mesopelagic zone, extends from a depth of 200 meters to about 1,000 meters. It is devoid of sunlight, which plays a crucial role in the biodiversity that thrives there. Here, organisms often possess unique adaptations to survive in the low-light conditions, making it a fascinating area for marine biologists.
Questions and answers
What is the ocean's twilight zone?
The ocean's twilight zone, also known as the mesopelagic zone, extends from 200 to 1,000 meters deep, receiving very little sunlight and hosting 90% of marine creatures.
Why do marine creatures live in the twilight zone?
Marine creatures live in the twilight zone because it provides a unique environment with low light levels, where they have special adaptations to survive and thrive.
What adaptations do organisms have in the mesopelagic zone?
Organisms in the mesopelagic zone often have adaptations like enhanced light sensitivity, bioluminescence, and specialized hunting or camouflage mechanisms to survive in low-light conditions.
How deep is the mesopelagic zone?
The mesopelagic zone ranges from about 200 meters to 1,000 meters below the ocean surface.