Elio Nicosia captured this extraordinary image of a male cardinalfish (Apogon imberbis) at the very moment that it released the eggs that has been brooding in its mouth. Elio took the picture during a night dive near Siracusa, Sicily, Italy.

He was using a Nikon D810 in an Isotecnic housing with a Nikkor 60mm macro lens. It was lit with two Seacam Seaflash 150 strobes. Settings were 1/250@f22, ISO80