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📘 How coral bleaching happens

Understand heat stress, symbiotic algae, pigment loss, energy budgets, recovery, and reef monitoring.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

Symbiosis
Heat stress
Color loss
Energy budget
Recovery
Other stressors
Light
Monitoring
Population response
A visible warning

Questions this course answers

What is coral bleaching?

Stress can cause corals to lose the algae that provide color and energy.

What commonly triggers mass bleaching?

Heat stress is a major trigger, with local factors modifying severity.

Can a bleached coral recover?

Surviving corals can regain algae, though recovery may be incomplete.

Why does bleaching reduce coral energy?

Algal loss forces corals to rely more on feeding and reserves.

Why monitor temperature and duration together?

Accumulated heat exposure predicts risk better than a single reading.

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