Neon colors may help some corals stage a comeback from bleaching

Coral pigments act as a sunscreen and may make a more hospitable home for returning algae

Acropora corals in New Caledonia

After a warm spell, some corals, like these Acropora corals in New Caledonia in the Pacific Ocean, turn bright hues instead of bleaching white. The corals boost their production of pigments after losing the beneficial algae that live in their cells, a study finds.

Richard Vevers/The Ocean Agency, XL Catlin Seaview Survey

For some corals, going bright may be part of their fight against bleaching.