the.com/reef
the ocean's biggest living thing, built entirely by animals smaller than your fingernail
living architectsCoral polyps build limestone cities over thousands of years
ancient builderGreat Barrier Reef is roughly 500,000 years old
tiny tenantsCover under 1% of ocean, host 25% of marine life
secret algaeCorals farm photosynthetic algae inside their own cells
stress signalBleaching is corals starving after expelling their algae