Arabian Seas — Season 1

Nine miles off the coast of Oman, a zebra shark scans the ocean floor for crustaceans, while a menacing giant stingray floats by. Soon, night becomes day and new killers emerge, from toxic scorpion fish to crown-of-thorns starfish, both bringing coral devastation. Dive among these deadly marine carnivores.

A seahorse blends perfectly into its coral surroundings, while a male day octopus hides to avoid the female's cannibalistic impulses. Meanwhile, cuttlefish change color to both attract mates and ward off rivals. Explore the Gulf of Oman, a kaleidoscope of color coordination, starring the dazzling masqueraders of the Arabian Sea.

Despite the scorching heat, a cold upwelling of nutrients in the Gulf of Oman creates favorable conditions for a host of marine migrants. The behemoth whale shark, hawksbill turtle, and millions of tiny, exotic fish settle in to feast. Take a plunge into the algae-cloaked coral reefs of this underwater tapestry.

In the Gulf of Oman, survival is all about defense. Some species of sea urchins and sea slugs rely on toxins to keep predators at bay, while guitarfish use their size and armored bodies to stay off the menu. Peek into a little-known reef where fortune favors the bold and the well-prepared.

On the beaches of Ras al-Jinz in Oman, thousands of sea turtle hatchlings dash towards the relative safety of the open sea. Nearby, an army of hungry ghost crabs, gulls, and foxes lie in wait, ready to pick them off. Witness the high-stakes outcome of one of nature's rarest and most enthralling nesting seasons.