Henley Spiers / Two Cortez angelfish (Pomacanthus zonipectus) swimming over reef, Cabo Pulmo National Park, Baja California Sur, Mexico, Pacific Ocean.

Henley Spiers / Giant damselfish (Microspathodon dorsalis) male, protecting its nest during breeding season from attack by hungry Cortez rainbow wrasse (Thalassoma lucasanum) initial phase and one in terminal phase,...

Henley Spiers / Blue-footed booby (Sula nebouxii) swimming up towards the surface with Sardine (Sardina sp.) prey in mouth, with shoal beneath, Espiritu Santo Island, Baja California Sur, Mexico, Pacific Ocean. Bird...

Henley Spiers / Northern gannet (Morus bassanus) diving underwater to feed on discarded fish, Shetland, Scotland, UK, North Sea. May.

Henley Spiers / Munk's devil rays (Mobula munkiana) juveniles, feeding on plankton at night, attracted to the green light hanging from a boat, Espiritu Santo Island, Baja California Sur, Mexico, Pacific Ocean.

Henley Spiers / Red snapper (Lutjanus bohar) in foreground and other reef fish in background including Napoleon wrasse (Cheilinus undulatus) feeding on discarded fish, Misool, Raja Ampat, Indonesia, Pacific Ocean

Henley Spiers / Starry-bodied guinea fowl pufferfish (Arothron meleagris) swimming among a huge shoal of Jackfish (Caranx sexfasciatus) Cabo Pulmo, Baja California Sur, Mexico, Pacific Ocean.

Henley Spiers / Green turtle (Chelonia mydas) swimming through a school of Glassfish (Chanda sp.), with a large number of other reef fish visible in background. Cabo Pulmo, Baja California Sur, Mexico, Pacific Ocean....

Henley Spiers / Coleman shrimp (Periclimenes colemani ) pair, resting within their Fire urchin (Astropyga radiata) host, Anilao, Mabini, Philippines, Pacific Ocean.

Henley Spiers / Leopard grouper (Mycteroperca rosacea) swimming towards a large school of Yellow snapper / Amarillo snapper (Lutjanus argentiventris) in the protected waters of Cabo Pulmo, Baja California Sur, Mexico...

Henley Spiers / Large whip goby (Bryaninops amplus) camouflaged on a narrow wire coral, Mactan, Cebu, Philippines, Pacific Ocean.

Henley Spiers / Lines of farmed Mussels (Mytilidae) in sunlit sea; they do not require feeding as they nourish themselves from nutrients in the passing water, improving water quality through filtration, Shetland, Sc...