Alex Mustard / Tiger cardinalfish (Cheilodipterus macrodon) male mouth brooding a clutch of eggs behind his sharp teeth. Gubal Island, Egypt. Strait Of Gubal, Red Sea.

Alex Mustard / Scissortail sergeants (Abudefduf sexfasciatus) swimming over hard corals (Acropora sp.) on shallow reef at sunset, split level view. Gubal Island, Egypt. Red Sea.

Alex Mustard / Reef octopus (Octopus cyanea) portrait near wreck. Gubal Island, Egypt. Red Sea.

Alex Mustard / White-belly damsel (Amblyglyphidodon leucogaster) photographed against the light patterns created by the setting sun on the surface of the ocean. Gubal Island, Egypt. Strait Of Gubal, Gulf of Suez, Re...

Alex Mustard / Lemon coral goby (Gobiodon citrinus) shelters in the branches of a coral (Acropora sp.). Gubal Island, Egypt. Strait Of Gubal, Red Sea.

Alex Mustard / A portrait of a tiny Unicorn goby (Cerogobius petrophilus). Gubal Island, Egypt. Red Sea.

Alex Mustard / Diver (Jennie Lawson) with a camouflaged Scorpionfish (Scorpaenopsis oxycephala) on a coral reef. Gubal Island, Egypt. Strait Of Gubal, Gulf of Suez, Red Sea.

Alex Mustard / Post larval Red Sea sailfin tang (Zebrasoma desjardinii), Gubal Island, Egypt. Strait Of Gubal, Gulf of Suez, Red Sea.

Alex Mustard / Portrait of Townsend's fangblenny (Plagiotremus townsendi) on a coral reef. Gubal Island, Egypt. Strait Of Gubal, Gulf of Suez, Red Sea.

Alex Mustard / Harlequin filefish (Oxymonacanthus halli) swimming over a hard coral looking for polyps to feed on. Gubal Island, Egypt. Strait Of Gubal, Gulf of Suez, Red Sea. Endemic.

Alex Mustard / Tiger cardinalfish (Cheilodipterus macrodon) male mouthbrooding eggs in his mouth. Gubal Barge, Gubal Island, Egypt. Strait of Gubal, Gulf of Suez, Red Sea