Water works: Divers planting coral fragments on an artificial reef tile whose grooves mimic the Platygyra coral in Hong Kong. — Bloomberg
HONG KONG: In the subtropical sea off northeast Hong Kong, orange and white-striped clownfish somersault like acrobats, black sea urchins furtively wiggle their antennas and crabs shuttle between crevices in a leggy panic.
Much of this activity in Hoi Ha Wan Marine Park gravitates around corals that are thriving on an artificial reef made of 3D-printed terracotta tiles, installed two years ago by researchers at the University of Hong Kong (HKU).
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