In general, mammals are animals that breed with childbirth and breastfeeding. But strangely enough there are several types of mammals that lay eggs or are often called Monotremata, here are mammals belonging to the Monotremata who still live in the world;
PLATIPUS
This animal form is semi-aquatic and is widely found in the eastern part of the Australian continent. Although Platypus lay eggs but he belongs to the class Mammalia because he breastfed his son. Platypus is also often known by the name duck-billed Platypus or duck-billed Platypus due to the shape of its beak that resembles a duck. The platypus includes a strange animal from the Animalia kingdom. The platypus has a beak like duck and webbed feet. The platypus looks like a distant duck brother.
EKIDNA
This is again the only animal of the Monotremata order that still survives in addition to the platypus. The surviving species, native to Papua and Australia, all belong to the Tachyglossidae family. Ekidna is named after the name of a monster in ancient Greek mythology. Ekidna breeds egg-laying, but also has mammary glands.
In this world there are still many mysteries that we do not know yet, there are still many species that we have not found, even in the ocean, only 5% exploration can be done, one thing is certain in the future, we will be surprised with new species!