Octopi: They have three hearts and blue blood. 

Jellyfish: Some species are immortal and can regenerate their organs. 

Seahorses: The male seahorse gives birth to the young. 

Sea Otters: They hold hands while sleeping to prevent drifting apart. 

Sloths: Their incredibly slow metabolism allows green algae to grow on their fur. 

Penguins: Males give their mates a special rock as a courtship gift. 

Lions: The female lion does about 90% of the hunting for the pride. 

Flamingos: They are born white and turn pink from their diet of brine shrimp and algae. 

Elephants: They cannot jump. 

Polar Bears: Their fur appears white but is transparent, while their skin is black to absorb heat. 

Wood Frogs: These frogs can freeze solid in the winter and then “thaw” and come back to life in the spring. 

Dolphins: They sleep with one eye open, keeping half their brain awake to remain alert. 

Horses: They have the largest eyes of any land animal and can see almost 360 degrees.

Giraffes: They have a surprisingly short sleep duration, sometimes only 30 minutes a day, and can sleep standing up. 

Koalas: Their fingerprints are so similar to human fingerprints that they can be mistaken for them. 

Cows: They form close bonds and can have “best friends”. 

Cheetahs: These cats can reach speeds of up to 120 km/h. 

Kangaroos: They are unable to move backward due to their leg structure. 

Capuchin Monkeys: These monkeys use tools, like rocks, to crack open nuts. 

Honey: The only food that never spoils. 

Pigs: They are incredibly intelligent animals. 

Turtles: Some species, like the freshwater turtle, can live for over 100 years. 

Owls: They can turn their heads 270 degrees to look around. 

Bees: A single bee can visit as many as 5,000 flowers in a day.