Classification
XXXXX Known wizard killer/ impossible to train or domesticate
XXXX Dangerous/ requires specialist knowledge/ skilled wizard may handle
XXX Competent wizard should cope
XX Harmless/ May be domesticated
X Boring
Kelpie: XXXX The British and Irish water demon can take various shapes, though it most often appears as a horse with bulrushes for a mane. Having lured the unwary onto its back, it will dive straight to the bottom of its river or lake and devour the rider, letting the entrails float to the surface. The correct means to overcome a Kelpie, is to get a bridal over its head with a Placement charm. The worlds largest Kelpie is found in Loch Ness (The Loch Ness Monster).
Knarl: XXX The Knarl is usually mistaken for a hedgehog by Muggles. The two species are indistinguishable except for one thing: If food is left in the garden for a hedgehog, it will accept and enjoy the gift, but the Knarl with assume that the food is a trap and destroy the garden of the Muggle.
Kneazle: XXX The Kneazle is a catlike creature with flecked, speckled, or spotted fur, outsize ears, and a tail like a lion's. The Kneazle is intelligent, independent, and occasionally aggressive, thought it could make an excellent pet. Kneazles have up to 8 kittens in a litter and can be bred with cats.
Leprechaun: XXX Leprechaun's are more intelligent than the fairy, but less malicious than the imp, pixie, or Doxy. They live mostly in forest and woodland areas. Leprechauns produce a gold like substance tha vanishes after a few hours, to their great amusement. They eat leaves and are not known to do damage to humans.
Lethifold (Living Shroud): XXXXX The Lethifold is a mercifully rare creature found solely in tropical climates. It resembles a black cloak perhaps half an inch thick, thicker if it has recently killed and digested its victim, which glides along the ground at night. The Patronus is the only spell known to repel a Lethifold. Since it generally attacks while the victim is sleeping, its victims rarely have a chance to use any magic against it.
Lobalug: XXX The Lobalug is found at the bottom of the North Sea. It is a simple creature, 10 inches long, comprising a rubbery spout and a venom sac. When threatened, the Lobalug contracts its venom sac, blasting the attacker with poison.
Mackled Malaclaw: XXX The Malaclaw resembles a lobster, but it must not be eaten, as its flesh is unfit for human consumption and will result in a high fever and an unsightly green rash. The Malaclaw can reach a length of 12 inches, and is light grey with deep green spots. The Malaclaw's bite has the unusual side effect of making the victim highly unlucky for a period of 1 week after the injury.
Manticore: XXXXX The manticore is a highly dangerous beast with the head of a man, the body of a lion, and the tail of a scorpion. As dangerous as the Chimaera, and as rare, the maticore is reputed to croon softly as it devours its prey. Manticore skin repels almost all known charms and the sting causes instant death.
Merpeople: XXXX Merpeople exist throughout the world. Their habits and customs remain as mysterious as the Centaur, though those wizards who have mastered the language of Mermish, speak highly of organized communities.
Moke: XXX The moke is a silver-green lizard reaching up to 10 inches in length, has the ability to shrink at will and has consequently never been noticed by muggles. Moke skin is highly prized among wizards for use as moneybags and purses.
Mooncalf: XX The Mooncalf is an intensely shy creature that only emerges from its burrow at the full moon. Its body is smooth and pale grey, it has bulging round eyes on top of its head, and four spindly legs with enormous flat feet. Mooncalves perform complicated dances on their hind legs in isolated areas in the moonlight.
Murtlap: XXX The Murtlap is a ratlike creature with a growth upon its back resembling a sea anemone. When pickled and eaten, these Murtlap growths promote resistance to curses and jinxes, though an overdose may cause unsightly purple ear hair. Murtlaps eat crustaceans and the feet of anyone foolish enough to step on them.
Niffler: XXX The Niffler is fluffy, black, and long snouted, this burrowing creature has a predilection for anything glittery. Nifflers are often used to burrow deep into the earth to find treasure. Though the Niffler is affectionate, it can be destructive to belongings and should never be kept in a house.
Nogtail: XXX Nogtails are demons found in rural areas, they resemble stunted piglets with long legs, thick, stubby tails, and narrow black eyes. It will creep into a sty, and suckle off a mother pig. The Nogtail is fast and hard to catch, but if chased off a farm by a pure white dog, it will never return.
Nundu: XXXXX This beast is arguably the most dangerous in the world. A gigantic leopard that moves silently despite its size and whose breath causes disease virulent enough to eliminate entire villages, it has never yet been subdued by fewer than a hundred skilled wizards working together.
Occamy: XXXX The Occamy is a plumed, 2 legged winged creature with a serpentine body, it may reach a length of fifteen feet. It feeds mainly on rats and birds, but has been known to carry off monkeys. The Occamy is aggressive to all who approach it, particularly in defence of its eggs, whose shells are made of the purest, softest silver.
Phoenix: XXXX The phoenix is a magnificent, swan-sized, scarlet bird with a long golden tail, beak, and talons. It lives to an immense age as it can regenerate, bursting into flames when its body begins to fail and rising again from the ashes as a chick. The phoenix is a gentle creature that has never been known to kill and eats only herbs. It can disappear and reappear at will. The Phoenix song is magical, it is reputed to increase the courage of the pure of heart and to strike fear into the hearts of the impure, its tears have powerful healing properties.
Pixie: XXX The pixie is electric blue in color, up to 8 inches in height and very mischievous, the pixie delights in tricks and pratical jokes of all descriptions. Although wingless, it can fly and has been known to seize unwary humans by the ears and deposit them at the tops of tall trees and buildings. Pixies produce a high pitched jabbering intelligible on to other pixies.
Plimpy: XXX The plimpy is a spherical, mottled fish distinguished by its two long legs ending in webbed feet. It inhabits deep lakes where it will prowl the bottom in search of food, preferring water snails.
Pogrebin: XXX The Pogrebin is barely a foot tall, with a hairy body but a smooth, oversized grey head. When crouching, it resembles a shiny, round rock. Pogrebins are attracted to humans and enjoy tailing them, staying in their shadow and crouching quickly should the shadow's owwner turn around.
Porlock: XX The Porlock is a horse-guardian who is covered in shaggy fur, has a large quantity of rough hair on its head and an exceptionally large nose. It walks on 2 cloven feet. The arms are small and end in four stubby fingers. Fully grown Porlocks are around 2 feet high and feed on grass.
Puffskein: XX The puffskein is spherical in shape and covered in soft, custard-colored fur, it is a docile creature that has no objection to being cuddled or thrown about. The puffskein is a scavenger that will eat anything from leftovers to spiders, but it has a particular preference for sticking its tounge up the nose of a sleeping wizard, and eating their boogies.
Quintaped (Hairy MacBoon): XXXXX The Quintaped is a highly dangerous carnivorous beast with a particular taste for humans. Its low slung body is covered with thick reddish-brown hair, as are its five legs, each of which ends in a clubfoot. The Quintaped is found only upon the Isle of Drear off the northernmost tip of Scotland. Drear has been made unplottable for this reason.
Ramora: XX The Ramora is a silver fish found in the Indian Ocean. Powerfully magical, it can anchor ships and is a guardian of seafarers.
Red Cap: XXX These dwarflike creatures live in holes on old battlegrounds or wherever human blood has been spilled. Although easily repelled by charms and hexes, they are very dangerous to solitary muggles, whom they will attempt to bludgeon to death on dark nights.
Re'em: XXXX Extremely rare giant oxen with golden hides, the Re'em are found in the wilds of America and the Far East. Re'em blood gives the drinker immense strength, though the difficulty in procuring it means that supplies are rare.
Runespoor: XXXX A three headed serpent, the Runespoor commonly reaches a lenght of 6-7 feet. Livid orange with black stripes, the Runespoor is only too seasy to spot, so the Ministry of Magic has designated certain forests unplottable for the Runespoor's sole use. Each of the Runespoors head serve a different purpose. The left head is the planner. The middle head is the dreamer. The right head is the critic. The right heads fangs are extremely venomous. The Runespoor produces eggs through its mouths, the only known magical beast to do so.
Salamander: XXX The slamander is a small fire-dwelling lizard that feeds on flame. Brilliant white, it appears blue or scarlet depending upon the heat of the fire in which it makes its appearance. Salamanders can survive outside a fire for 6 hours, if regularly fed pepper. They will live only as long as the fire from which they sprang burns.
Sea Serpent: XXX Sea serpents are alarming in appearance, they are not known ever to have killed any human. They reach lengths of up to 100 feet, it has a horselike head and a long snakelike body that rises in humps out of the sea.
Shrake: XXX A fish covered entirely in spines is believed to have been created as a revenge against muggle fisherman who had insulted a team of sailing wizards in the early 1800's.
Snidget: XXXX The Golden Snidget is an extremely rare, protected species of bird. Completely round, with a very long, thin beak and glistening, jewel like red eyes, the Golden Snidget is an extremely fast flier that can change direction with uncanny speed and skill owing to the rotational joints of its wings.
Sphinx: XXXX The Egyptioan sphinx has a human head on a lion's body. It is used by witches and wizards to guard valuables and secret hideaways. Highly intelligent, the sphinx delights in puzzles and riddles. It is usually dangerous only when what it is guarding is threatened.
Streeler: XXX The Streeler is a giant snail that changes color on an hourly basis and deposits behind it a trail so venomous that it shrivels and burns all vegetation over which it passes. Its venom is used to kill Horklumps.
Tebo: XXXX The Tebo is an ash-colored warthog that has the power of invisibility, making it difficult to evade or catch, and is very dangerous.
Troll: XXXX The troll is a fearsome creature up to 12 feet tall and weighing over a ton. Notable for its strength and stupidity, the troll is often violent and unpredictable. There are 3 types of troll: mountain, forest, and river. Trolls eat raw flesh and are not fussy in their prey, which ranges from wild animals to humans.
Unicorn: XXXX The Unicorn is a beautiful beast found throughout the forests of northern Europe. It is pure white, horned horse when fully grown, though the foals are golden and turn silver before achieving maturity. The unicorn's horn, blood, and hair all have highly magical properties.
Werewolf: XXXXX The werewolf is believed to have originated in nothern Europe. Humans turn into werewolves only when bitten. There is no known cure, though recent developments in potion-making have to a great extent aleviated the worst symptons. Once a month, at the full moon, a wizard or muggle will transform into a werewolf. The werewolf actively seeks humans in preference to any other kind of prey.
Winged Horse: XX-XXXX There are many different breeds, inluding the Abraxan (immensely pwerful giant palominos), the Aethonan (chestnut), the Granian (grey and particularly fast) and the rare Thestral (black, possesses of the power of invisibility, and considered unlucky by many wizards).
Yeti (Bigfoot, the Abominable Snowman): XXXX The yeti is believed to be related to the troll, though no one has yet got close enough to conduct a necessary tests. Up to 15 feet in height, it is covered from head to toe in the purest white hair. The yeti eats anything that strays into its path, though it fears fire, and may be repulsed by skilled wizards.
Information taken from Fantastic Beasts and Where to find them!!