Seahorses are the only animals in the entire animal kingdom in which the male has babies. Their mating is usually done under a Full Moon. Also, while mating, they utter musical sounds.

Penguin is the only animal where males takes care of his eggs and the female goes to hunt for food and returns after months.

Emperor, King, and Humboldt are all different types of penguins.

Butterfly's life is only one day.

Crab conceives only for her destruction.