The king cobra, scientifically known as Ophiophagus hannah, has several physical characteristics that set it apart from other snake species.

They are the world's longest venomous snakes, capable of reaching lengths of up to 18.5 feet (5.6 meters) or more. These snakes typically have olive-green to brownish-black scales made of keratin (the same thing in human fingernails), with lighter yellow bands or crossbars along their body.

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They also have distinctively large, prominent nostrils, which may aid in their sense of smell.

When threatened or agitated, king cobras can spread a distinctive hood by extending their ribs and skin, displaying a pattern resembling a pair of spectacles or eyeglasses. They have broad, elongated heads with prominent jaws, which allow them to deliver a potent venomous bite.

King cobras possess potent neurotoxic venom, capable of immobilizing or killing their prey. While they are generally reclusive and prefer to avoid human encounters, they can become aggressive and strike if they feel threatened or cornered.

These serpents also have notable longevity compared to other snakes, with a lifespan that can extend up to 20 years in the wild. But despite its name, the fierce and aggressive snake is not a true cobra in the taxonomic sense. In fact, it is the sole member of its own genus, Ophiophagus.