Penguins, known by their Latin name Spheniscidae, belong to a group of seabirds that cannot fly, but swim and dive perfectly. These creatures are the only representatives of the Sphenisciformes family. Currently, there are 18 known species of penguins in this family. The largest of them is considered to be the Emperor penguin, which can reach a height of up to 120 cm and weigh more than 40 kg. The smallest species is the small (or blue) penguin.Penguins, known by their Latin name Spheniscidae, belong to a group of seabirds that cannot fly, but swim and dive perfectly. These creatures are the only representatives of the Sphenisciformes family. Currently, there are 18 known species of penguins in this family. The largest of them is considered to be the Emperor penguin, which can reach a height of up to 120 cm and weigh more than 40 kg. The smallest species is the small (or blue) penguin.