: They possess thick blubber and waterproof feathers coated in oil from a preen gland to stay dry and warm.

: Most species are monogamous during the breeding season. Some, like the Fjordland crested penguin , form lifelong bonds.

: The Emperor penguin can dive to depths of 550 meters (1,800 feet), the deepest of any bird.

: Their distinctive black-and-white look is functional camouflage: a dark back blends with the ocean floor for predators above, while a white belly mimics the bright surface for predators below. Extreme Adaptations :

are world-famous as flightless, tuxedo-clad birds, they are actually highly specialized marine hunters. Most of the 18 to 21 species live in temperate coastal waters rather than the deep Antarctic. Key Biological Features