Pegasus is a mythical winged divine horse, and one of the most recognized creatures in Greek mythology. Usually he is depicted as pure white. Myths about him vary as the Greek myths evolve and reflect progression through successive generations of deities.

In Archaic Greek mythology, Pegasus is the offspring of the Gorgon Medusa, when she was depicted as a mare. In later myths, Pegasus was foaled by Medusa as she was dying, while being decapitated by the hero Perseus.

In Classical Greek mythology, the Olympian god Poseidon is identified as the father of Pegasus. Pegasus is the brother of Chrysaor and the uncle of Geryon. Pegasus was caught by the Greek hero Bellerophon near the fountain Peirene with the help of Athena and Poseidon. Pegasus allowed Bellerophon to ride him in order to defeat the monstrous Chimera, which led to many other exploits. Bellerophon later fell from the winged horse's back while trying to reach Mount Olympus, where the deities resided. After that failed attempt, Zeus transformed Pegasus into the eponymous constellation.

https://en.wikipedia.org/wiki/Pegasus

The Chimera, also Chimaera, according to Greek mythology, was a monstrous fire-breathing hybrid creature, composed of different animal parts from Lycia, Asia Minor. It is usually depicted as a lion, with the head of a goat protruding from its back, and a tail that might end with a snake's head. It was an offspring of Typhon and Echidna and a sibling of such monsters as Cerberus and the Lernaean Hydra.

The term "chimera" has come to describe any mythical or fictional creature with parts taken from various animals, to describe anything composed of very disparate parts, or perceived as wildly imaginative, implausible, or dazzling.

https://en.wikipedia.org/wiki/Chimera_(mythology)

In Greek mythology, Cerberus often referred to as the hound of Hades, is a multi-headed dog that guards the gates of the Underworld to prevent the dead from leaving. He was the offspring of the monsters Echidna and Typhon, and was usually described as having three heads, a serpent for a tail, and snakes protruding from multiple parts of his body. Cerberus is primarily known for his capture by Heracles, the last of Heracles' twelve labours.

Descriptions of Cerberus vary, including the number of his heads. Cerberus was usually three-headed, though not always. Cerberus had several multi-headed relatives. His father was the multi snake-headed Typhon, and Cerberus was the brother of three other multi-headed monsters, the multi-snake-headed Lernaean Hydra; Orthrus, the two-headed dog who guarded the Cattle of Geryon; and the Chimera, who had three heads: that of a lion, a goat, and a snake. And, like these close relatives, Cerberus was, with only the rare iconographic exception, multi-headed.

https://en.wikipedia.org/wiki/Cerberus

Zilant is a dangerous dragon with two paws, half snake- half bird. It is spoken about in the legends of the peoples of Eastern Europe and the European part of Russia. Zilant has a long snake tail, chicken paws and bright red wings. He can fly very fast. His head, like a real dragon, is covered with scales. The Zilant has horns, a long pointed tongue protrudes from its mouth, and flames escape from its nostrils. The Kazan Zilant became most famous. A long time ago, the khan decided to establish Kazan on the Zilantova Mountain. The place was good, but it was teeming with snakes. The khan ordered to pull firewood and burn it along with the snakes. And so they did. However, the largest snake Zilant escaped from the fire and took refuge in a cave nearby. From there, he sometimes flew out to drink water from the Black Lake and take revenge on his abusers. There are a lot of stories about this creepy snake…

In European bestiaries and legends, a basilisk is a legendary reptilereputed to be a serpent king, who can cause deathwith a single glance. According to the Naturalis Historia of Pliny the Elder, the basilisk of Cyrene is a small snake, "being not more than twelve fingers in length", that is so venomous, it leaves a wide trail of deadly venom in its wake, and its gaze is likewise lethal.

The basilisk's weakness is the odor of the weasel, which, according to Pliny, was thrown into the basilisk's hole, recognizable because some of the surrounding shrubs and grass had been scorched by its presence. It is possible that the legend of the basilisk and its association with the weasel in Europewas inspired by accounts of certain species of Asiatic snakes (such as the king cobra) and their natural predator, the mongoose.

The kraken is a legendary sea monsterof enormous size said to appear off the coasts of Norway.

Kraken, the subject of sailors' superstitions and mythos, was first described in the modern age at the turn of the 18th century, first in a travelogue by Francesco Negri in 1700, followed in 1734 by an account from Dano-Norwegian missionary and explorer Hans Egede, who described the kraken in detail and equated it with the hafgufa of medieval lore. However, the first description of the creature is usually credited to the Norwegian bishop Pontoppidan (1753). Pontoppidan was the first to describe the kraken as an octopus (polypus) of tremendous size, and wrote that it had a reputation of pulling down ships, but the French malacologistDenys-Montfort of the 19th century is better known for these.

The great man-killing octopus entered French fiction when novelist Victor Hugo (1866) introduced the pieuvre octopus of Guernsey lore, which he identified with the kraken of legend, and this led to Jules Verne's depiction of the kraken, which he did not really distinguish between squid or octopus.

The legend may have indeed originated from sightings of giant squid, which may grow to 13–15 meters (40–50 feet) in length.

If Linnaeus wrote on the kraken, he only did so indirectly. Linnaeus had published on the Microcosmus genus (an animal with various other organisms or growths attached to it, comprising a colony). And these, including Bartholin's cetus called hafgufa, and Paullini's monstrous marinum. These have been referred to as "krakens" by subsequent authors. The claim that Linnaeus printed the vernacular name "kraken" in the margin of a later edition of Systema Naturae fails to be confirmed, and another claim that he published on the cephalopod species Sepia microcosmus

In Norse mythology, Ratatoskr (Old Norse, generally considered to mean "drill-tooth" or "bore-tooth") is a squirrel who runs up and down the world tree Yggdrasil to carry messages between the eagles perched atop Yggdrasil, and the serpent Níðhöggr, who dwells beneath one of the three roots of the tree. Ratatoskr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

Fenrir ("fen-dweller") or Fenrisúlfr ("Fenrir's wolf", often translated "Fenris-wolf"), also referred to as Hróðvitnir ("fame-wolf") and Vánagandr "monster of the [River] Ván"), or Vanargand, is a wolf in Norse mythology. Fenrir, together with Hel and the World Serpent, is a child of Loki and giantess Angrboða. He is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda and Heimskringla, written in the 13th century by Snorri Sturluson. In both the Poetic Edda and Prose Edda, Fenrir is the father of the wolves Sköll and Hati Hróðvitnisson, is a son of Loki and is foretold to kill the god Odin during the events of Ragnarök, but will in turn be killed by Odin's son Víðarr.

In the Prose Edda, additional information is given about Fenrir, including that, due to the gods' knowledge of prophecies foretelling great trouble from Fenrir and his rapid growth, the gods bound him and as a result Fenrir bit off the right hand of the god Týr. Depictions of Fenrir have been identified on various objects and scholarly theories have been proposed regarding Fenrir's relation to other canine beings in Norse mythology. Fenrir has been the subject of artistic depictions and he appears in literature.

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