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The startling warning by Darryl Torckler. “Illuminated, this is the world’s most spectacular sea urchin, yet it remained undiscovered until 1965. That’s partly because the fiery sea urchin only inhabits deeper reefs off northern New Zealand and southern Australia. But it is also because it hides away in the day, and in deeper water, where red wavelengths are filtered out, it appears black or deep brown rather than fiery red. Its obvious defence, of course, is its needle-like spines”. (Photo by Darryl Torckler/Unforgettable Underwater Photography/NHM)
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