Coral surface extreme close-up revealing many hidden details and colours.

 Coral surface extreme close-up revealing many hidden details and colours.

 Coral surface extreme close-up revealing many hidden details and colours.

 Hard coral close-up.

 Hard coral fluorescence.
Regular light image of a coral of the same species.

 Hard coral (Fungia sp.) fluorescence. This is a young polyp.
Regular light image of the same coral.
Open Gorgonian Fan (Gorgonacea sp.) polyps. 
Individual tiny polyps form colonies that are normally erect, flattened, branching, and reminiscent of a fan. 

Macro photograph taken at Marys Wall, Poor Knights Islands Marine Reserve, Northland, New Zealand.

 Hard coral (Fungia sp.) fluorescence.
Regular light image of the same coral.

 A sick hard coral (Stylophora sp.) emitting green fluorescence. The lower part of the coral has more red colors as the symbiotic algae didn't leave the polyps. The top part, however, shows signs of disease that are invisible without fluorescence. 
Regular light image of the same coral.

Coral surface extreme close-up revealing many hidden details and colours.

Coral surface extreme close-up revealing many hidden details and colours.

See photo in original gallery.