- Main article: Jabberwocky
The Jabberwocky is native to Wonderland, and first appear in the ninth episode of Once Upon a Time in Wonderland. She is an ancient creature who can enter the minds of anyone and use their fears against them. She is described as stronger than an entire army.
- Main article: Leviathan
The Leviathan is native to the Enchanted Forest, and first appear in the graphic fiction novel, Out of the Past. It is described as a sea monster attacking from the depths of the ocean. It is also able to produce a green mist, which can create illusions.
- Main article: Mermaids
Mermaids are native to the Enchanted Forest and Neverland, and first appear in the first episode of the third season of Once Upon a Time. They are sea creatures with lower halves of a swimming fin and the upper bodies bearing resemblance to a human woman's. Their power is great in attacking ships, but they are evasive to fire. According to Hook, mermaids are liars and cannot be trusted. Template:Ep
- A mermaid named Ariel, who befriends Snow White and later assists Belle with finding a special box. ("Ariel", "Dark Hollow")
- Snow White briefly became a mermaid because of the bracelet that Ariel (originally given to her by the Evil Queen) gave her. ("Ariel")
- A mermaid, originally part of a swarm ramming Hook's ship, is separated after being caught on fishing line by Emma and Mary Margaret. Along with her, a conch shell stuck in the net is pulled up to deck. Unable to plead her way through to being set free, the mermaid signals a sound from the shell to the sky; causing a rumbling of an approaching storm. She warns they must let her go, or die. Unable to come to a unanimous decision with the others, Regina makes the choice to turn the mermaid into a wooden statue to stop whatever was summoned by the shell. Rather than that, it speeds up into a full on storm. Template:Ep3
Known Mock TurtleEdit
- Alice and Will Scarlet end up on the back of a Mock Turtle after being dropped by Silvermist. They use the creature to take them to the other side of the lake.
- Main article: Mome Raths
Mome Raths are native to Wonderland, and first appear in the ninth episode of Once Upon a Time in Wonderland. They are some of the wildest and deadliest creatures of the land, which look like big black wolves with two sparkling violet eyes (though the illustration in Jafar's book depicts it as a three-headed creature). According to the Red Queen, their mouths are full of fangs, which give the appearance they are pressed together by two beds of nails. They are also attracted to bright lights. Template:Ep
Known Mome RathsEdit
- Five Mome Raths attacked the Red Queen, Alice, and Cyrus when they were tied to a post by peasants are angry at the Red Queen for not protecting their lands from the wild beasts that have been invading their lands. The lit fires surrounding the trio attract them, even though they put out the torches, due to the glow of Alice's necklace. She throws the pendant at the Mome Raths, who then begin fighting over the object, while the three of them flee. Template:Ep3
- Main article: Ogres
Ogres are native to the Enchanted Forest, and first appear in the third episode of the second season of Once Upon a Time. They are large, brutish, and dark creatures at constant enemies with humans in Ogre Wars. Their strength lies in their sense of hearing, but are blind and can usually be taken down if shot in the eye. Template:Ep
- An ogre, follower of the Evil Queen, is one of the "dark souls" that gather to see her cast the Dark Curse. Template:Ep
- Emma is almost killed by an ogre, but he is shot and taken down by Mary Margaret. Template:Ep3
- An ogre attacks Belle and her mother during the war. Template:Ep
The Phantom Knights are a bunch of possessed armor that reside in Brocéliande. A bunch of them attacked David Nolan after he claimed a specific toadstool. They tried to drown David only for him to be saved by King Arthur. Template:Ep
- Main article: Rock Trolls
Rock Trolls are a type of Troll native to Arendelle, and first appear in the first episode of the fourth season. They reside at the Valley of the Living Rock. They have the ability to morph into rocks. The Rock Trolls are said to be more friendly than the Bridge Trolls. According to the Snow Queen, they can erase memories. Template:Ep
Known Rock TrollsEdit
- Grand Pabbie is the Rock Troll King. He helped Anna and Elsa find out where their parents, prior to their deaths, were headed towards on a sea voyage. Template:Ep3
The Sarlacc is native to Wonderland, and is mentioned in the third episode. In the Red Queen's book, it is depicted as a long quadruped creature with two tusks and a tail. The book also shows it as living on a mountain near the ocean. It is able to digest his victims over a millennia.
- Main article: Siren
The Siren is native to the Enchanted Forest, and first appear in the thirteenth episode of the first season. She is the guardian of Lake Nostos, and protect its waters from everyone. She uses the waters to transform herself into her victims' desires, then drowns them in the Lake.
- Main article: Unicorns
Unicorns are native to the Enchanted Forest, and first appear in the second episode of the first season of Once Upon a Time. Each bears a resemblance to a horse, except their foreheads are decorated with a horn. It is unknown if they possess any special powers.
- A unicorn is a pet and companion of the witch Maleficent. Template:Ep
- When Rumplestiltskin is teaching Regina how to use magic, he required her to rip out the heart of a unicorn and crush it. Template:Ep
- Snow White and Prince Charming searched for a unicorn so they may see a vision of what their daughter, Emma, will become in the future once they touch its horn. Template:Ep
- Main article: Werewolves
Werewolves are native to the Enchanted Forest, and first appear in the fifteenth episode of the first season of Once Upon a Time. A person has the ability to turn into a wolf if born via genetic inheritance with the ability to shapeshift during the full moon, also known as "wolf's time". A person born without the gene can become susceptible to also having the ability to shapeshift by being scratched by a werewolf. Template:Ep
- Main article: Will-o'-the-wisps
Will-o'-the-wisps, better known as the Wisps, are native to the Enchanted Forest, and first appear in the first episode of the five season of Once Upon a Time. They are living beings which appear as flying blue flames. They are able to lead people to where ever they need to be. Template:Ep
- Merida and Emma tracked down a wisp when they met. After Merida captured it, she told Emma that she would be able to use it after her. However, after being convinced by the Darkness - under Rumplestiltskin's appearance - that Merida was lying, Emma confronted the warrior queen, as she was asking the Wisp to help her. After their confrontation, the wisp "runs away", and Merida decides to go after it. Template:Ep3
- Main article: Wraith
The Wraith is native to the Enchanted Forest, and first appear in the first appear of the second season. It hunts its victim down and sucks its soul out, leaving a lifeless body. According to Regina Mills, it is an undead creature and thus cannot be killed again. A Wraith Medallion is able to summon it.