Chapter 1
Survival in the twilight and midnight zones
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Chapter 2
Life without sunlight at hydrothermal vents
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Chapter 3
Bizarre giants of the abyssal plains
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Chapter 4
Modern exploration tech and recent discoveries
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YOUR GOAL
Master of Into the deep ocean
Ch 1 · Survival in the twilight and midnight zones
teacher Twilight and Midnight Zones
Where light won't reach, In ocean deep, Bioluminescent life, Their secrets keep!
Fun Fact
Bioluminescent squid: The strawberry squid has one giant blue eye to look up for shadows and one small yellow eye to look down for flashes.
Glossary
bioluminescence (noun)
The biochemical emission of light by a living organism. A deep-sea shrimp releases a glowing blue cloud to distract and escape a pursuing viperfish.
The biochemical emission of light by a living organism. A deep-sea shrimp releases a glowing blue cloud to distract and escape a pursuing viperfish.
Quiz
How does the female deep-sea anglerfish attract prey in the dark bathypelagic zone?
Quiz
What percentage of deep-sea organisms are estimated to produce their own light through bioluminescence?
Quiz
Which organs of the glass octopus are NOT transparent and must be carefully positioned to avoid casting shadows?
Quiz
What unique physical feature allows the barreleye fish to search for prey directly above its head?