Hard coral fluorescence. Although it looks like it's a painted picture, that's how this coral looks up close.The image is a depth of field stack.

 Hard coral (Stylophora sp.) fluorescence. A crab sits between branches.
 This picture was very challenging as the crab was mobile and I had to stack a lot of shots to get the entire depth of field.

 Hard coral fluorescence.

 Hard coral (Stylophora sp.) fluorescence. A crab sits between branches.

Hard coral (Stylophora sp.) fluorescenceThe image is a depth of field stack.

 Hard coral (Acropora sp.) fluorescence.
The image is a depth of field stack.

Hard coral (Stylophora sp.) fluorescence.
The image is a depth of field stack.

 Hard coral fluorescence. Without fluorescence these two corals look very similar.

 Hard coral (Acropora sp.) fluorescence.
The image is a depth of field stack.

Hard coral fluorescence. Without fluorescence these two corals look very similar.

Hard coral fluorescence. Without fluorescence these two corals look very similar.

See photo in original gallery.