Pascal Kobeh / Nassau grouper (Epinephelus striatus), San Salvador Island / Colombus Island, Bahamas. Caribbean.

Pascal Kobeh / Fight between Nassau grouper (Epinephelus striatus) and a Common octopus (Octopus vulgaris), San Salvador Island / Colombus Island, Bahamas. Caribbean.

Shane Gross / Critically endangered Nassau grouper (Epinephelus striatus) swimming through coral reef near Eleuthera Island, Bahamas, North Atlantic Island.

Pascal Kobeh / Nassau grouper (Epinephelus striatus) on the reef with a Caribbean reef shark (Carcharhinus perezii) in the background, The Gardens of the Queen, Cuba, Caribbean Sea.

Pascal Kobeh / Nassau grouper (Epinephelus striatus) on the reef with common seafans or gorgonians (Gorgonia ventalina), The Gardens of the Queen, Cuba, Caribbean Sea.

Alex Mustard / Nassau grouper (Epinephelus striatus) swimming among sea plumes (Pseudopterogorgia sp.) on a coral reef. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Alex Mustard / Caribbean reef shark (Carcharhinus perezi) swimming over a coral reef, watched by a Nassau grouper (Epinephelus striatus) surrounded by common sea fans (Gorgonia ventalina). Jardines de la Reina, Gard...

Alex Mustard / Caribbean reef shark (Carcharhinus perezi) swims past a brown tube sponge (Agelas conifera) growing on a coral reef, while a Nassau grouper (Epinephelus striatus) hides below. Jardines de la Reina, Ga...

Claudio Contreras / Nassau grouper (Epinephelus striatus) Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba.

Claudio Contreras / Nassau grouper (Epinephelus striatus) , Tarpon (Megalops atlanticus), and Longspine squirrelfish (Holocentrus rufus), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de...

Shane Gross / Nassau grouper (Epinephelus striatus) gather during the winter full moons to spawn. Image made in The Bahamas. Critically endangered

Shane Gross / Nassau grouper (Epinephelus striatus) showing the change in color pattern during spawning. Critically Endangered Species. Bahamas