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Manticore: The manticore of Central Asia is a kind of chimera , that is sometimes said to be related to the Shpinx. It is portrayed with having the face of a human, the body of a lion, and the tail of a scorpion. The tail contins the most deadlist venom, as well three row of sharp teeth. It was often feared as being violent and feral, but it was not until the manticore was incorporated into European during the Middle Ages that it came to be regarded as an omen of evil.

Maero: The Maero are wild, violent men with long, bony fingers and long, dirty hair. They killed their prey with long, sharp fingernails and then ate them.

Mandrake: A plant is used in magic rituals of sorcerers and witches. The roots resemble of a human figure. When the root is dug up, it screams and kills all who hear it. 

Mannegishi: A race of trickster people in Cree folklore. They are described as semi-humanoid, being sexdactylous humans with very thin and lanky arms and legs and big heads minus a nose. These people are said to live between rocks in the rapids. One of their biggest delights is to crawling out of rocks and capsize the canoes of people canoeing through the rapids, spinning them to their death.

Manananggal: Manananggal is an aswang that can fly after separating itself from the lower half of its body. It eats babies and fetuses from a mother’s womb. It eats babies by means of passing their long tongue through a small hole from the roof of a house. The sharp end of the tongue touches the mother's navel to suck the blood of the fetus or unborn child. This creature's name was derived from the Filipino word, tanggal, which means "to separate" because of the manananggal's ability to separate itself from its lower body.

Mapinguari: A giant sloth that is repoted to be sighted in the Brazilian rainforest. According to legend, it is slow but ferocious and very dangerous due to its ability to move without noise in the thick vegetation, surprising the unsuspecting locals. Its only known weakness is that it avoids bodies of water.

Mare: A female nightmare demon that sits on people's chests. 

 Marabbecca:  A melevolent water sprite that lives in wells and reservoirs, drowning it's victims when they get to close to the waters. 

Mares of Diomedes: Viscious felsh eating hores of Greek mythology. Some versions say that they expelled fire when they breathed. They were wild and uncontrollable.

Marid: A water based elemental jinn. 

Mboi Tu'i: A hybrid of a parrot and serpant. He is considered the protector of aquatic animals and the wetlands. He enjoys the humidity and flowers.

Medusa: The most famous of the gogon sisters in Greek legend. She was once a young mortal woman who was praised for her beauty. Until the goddess Athena discovered her affair with Posideon, the lord of the sea, in her temple. As punishment for this adultery, her hair was turned into a mass of writhing snakes, her skin became covered in scales. Any living creature who looked at her was turned into stone.   

Melusine: A fairy lover of Medival lengd. She has the upper body of a woman, the wings, talons and tail of a dragon. 

Menehunas: They're the most well-known faeries in Polynesia, and are seen as dwarves in native dress who live in tropical forests. They can be tricksters, but they will also serve humans. Like the Leprechauns, they guard a crock of treasure and can grant wishes if they're caught. They have also been known to help lost travelers find their way out of the jungles, and some accounts say they have even provided fresh water and food for these people.

Merfolk: Merfolk are a race of half human-half fish. They appear in a plethora of cultures worldwide.

The mermaid is an aquatic creature with the head and torso of human female and a fish-like tail. They can be seen sitting on the rocky edges, singing to sailors, enchanting them, and luring them to their death. They are also said to appear before a storm. 

The male version of a mermaid is known as a "merman," They are said to create storms at sea and persue human women as their brides. 

 Mimi: Extremely elongated humanoid that has to live in rock crevasses to avoid blowing away. They are said to have taught the Aborigines of Australia how to hunt, prepare kangaroo meat and use fire.

Minotaur: The monsterous offspring of King Mino's wife and bull. With the horns and face of bull and the body of man, this monsterous creature was kept within the labryinth where seven youths were sacrificed to the monster.  

Mothman: A tall vaguely humanoid creature with red eyes and broad wings. It is said to be an omen tragdies to come.

Mokele-mbeme: A dinosaur like creature reported in the Republic of the Congo.

Muses: Goddesses of poetry, arts, knowledge and literature. They drawn to any artists and inspires them to create their artistic ideas.

Myrmecleon: It has the face of a lion and the body of an ant, with each part having its appropriate nature. Because the lion part will only eat meat and the ant part can only digest grain, the ant-lion starves.