While we have no description of the Drakes, we can assume that they are some sort of Snake or Dragon.
Hippogriffs are creatures from the Harry Potter Universe, created by JK Rowling. They are never mentioned in the novels, but Pierce stated in an Interview that they do exist, mainly for highColors to hunt as sport.
Ice Dragon Edit
Griffins are creatures originally from ancient mythology and folklore that have been created into living, breathing animals by Carvers. They generally live in cold climates and at high altitudes, such as the Antarctic or mountain ranges. The Valkyrie often used griffins to traverse the lands of their Southern Martian homeland.
The Gruesli Edit
The Gruesli is a creature that lives in some sort of liquid. Lysander called it a "Tiny Horror." It's a hideous spider-legged slug with corpse-pale skin and a belly riddled with small hungry apertures. Through these apertures, push thin tentacles, and from them come small black stingers. The creature squeals like a burning worm. Using its stingers, it eats masks. It was used by Dido au Raa to help uncover Cassius' true identity in Iron Gold. 
Kuon Hounds Edit
Kuon Hounds are Canine-Insect hybrids that are bred for war, and used by Gray Hound-Masters. They have Chitinous black shells along their torso that ripple grey as they move. they have spines of needle-thick translucent hair that stands on end on their backs. Their eyes are yellow and compound, and their bark is described as deafening.
While they are only briefly mentioned in Iron Gold, they have no description. A Manticore is an animal of Persian Legends. They have the head of a human, body of a lion and a tail of venomous spines similar to porcupine quills, while other depictions have it with the tail of a scorpion. There are some accounts that the spines can be shot like arrows, thus making the Manticore a lethal predator. It eats its victims whole, using its triple rows of teeth, and leaves no bones behind.
There are many different types of mermaids. Some are Pinks carved to look like the Mermaids of fantasy and mythology. Other reside in the oceans of Europa and are described as "Reptilian [...] one foot long with humaniod faces, grey skin, and skulls shaped like crowns" and are also mentioned to have "Hateful, little crow eyes."
While there are no known descriptions of the Monkeycat, we can safely assume that they are a combination of Monkeys and a Cat of some type. They were present in the Gardens of the Citadel at The Gala.
The Oracles were made by Zanzibar for Sovereign Octavia au Lune. They have three eyes, and are part Scorpion, Pitviper and Centipede. Their skin is transparent, with all of their organs and skeleton visible. They move like liquid glass and have chitinous mouths that chatter and hiss at the same time. They love blood, and if given a constant source, can tell if someone is lying. The poison from their scorpion tail isn't fatal, but "If there's a hell, what's in the stinger is as close as science has let us come."
After the Rise of the Republic, Mustang ordered the destruction of all of the Oracles. However, some survived, and one was used by Niobe au Telemanus when Lyria was under investigation for the kidnapping of Pax and Electra.
Sea Demon (From the Third Level of Hel) Edit
Simply described as "huge," "beastie" and "scaly bitch," this creature lives in the Thermic Sea of Mars. Sometime between the events of Golden Son and Morning Star, Ragnar was eaten by one after tripping over Pebble and falling out of a ship. Sevro went to rescue him, but Ragnar clawed his way out of the Sea Demon's rectum.
Spiderworms are creatures with fur that are brown and black, They possess spindly long legs but their torsos can be thicker than a human thigh. LowRed woman harvest their silk to make woven goods in the Webbery.
While there are no known descriptions of the Tigerlynx, we can safely assume that they are a combination of Tigers and Lynxes. They were present in the Gardens of the Citadel at The Gala.
While there are no known description of the Zebracores, we can safely assume that they are a combination of Zebras and Unicorns.
Resurrected Creatures Edit
The following are a list of animals that went extinct, but were brought back to life by Carvers.
- ↑ Iron Gold Chapter 38