Mutated Creatures in (Unnamed) Tabletop Game

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Midwest
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Horned Wolf: A large, 4' tall wolf with horns like a demon and black, onyx fur that has patches missing all over. Razor sharp teeth, travel in packs of several dozen and hunt in pairs. People that are bit by them (unless immune to radiation) will lose the limb bitten due to a radioactive substance secreted from their jaws.
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Bullet Frog: A pitch black frog that lives on the banks of large rivers. It's powerful back legs can launch them at speeds in excess of 100mph. Their tongues have a habit of shooting out randomly, latching onto and pulling them around like a grappling hook. A single hit from the Bullet Frog can tear a limb right off.
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Razorjaw Squirrel: A 2' tall crimson colored squirrel known for it's razor coated gums and it's ability to open it's mouth wide to eat other animals completely.
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West Coast Desert (everything west of the Rocky Mountains)
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Camel Scorpion: An exotic pet collector's pets that were left behind after the bombs fell got out of their habitats and mated, creating one of the most fear inducing monsters in the West Coast Desert. Over the course of 80 years, they've grown large and have begun inhabiting all corners of the desert. Grown to be 3 feet tall and 8 feet long due to prolonged exposure to radiation by a crater, they've become venomous hellions that strike at anyone and everything in their path. With a giant stinger and tail that reaches up nearly 8 feet when uncurled and a vicious set of razor sharp mandibles, they sneak up and eat people in their sleep or poison someone before ingesting them.
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Dust Cloud Jellyfish: A species of jellyfish mutated to be able to survive on land. They vary in size from small (3' long when expelling air) to large (10' long when expelling air). Their rust brown color comes from their diet, which includes random air particulates and eating rust from metallic objects. They are able to float through the air due to their incredibly light size and their ability to shoot air out of themselves to push themselves along. The reason behind the name is that these jellyfish often move around from the slightest breeze and love to reside in Dust Clouds. It doesn't take much to kill them and their main body has become a somewhat rare but enticing food to anyone with a little bit of spending money.
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Gulpermander: 20' long eel with razor sharp teeth and a jaw like a pelican. It has grown legs and the ability to survive on land due to latent radiation in the sea, causing it to live on land and adapt to deserts. It strikes from under the sand with a viciously fast bite known to swallow unsuspecting travellers whole.
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Radioactive Roadrunner: A giant mutated Roadrunner used as a mount by several factions across the West Coast Desert, though mainly by the Flagstaff Cavalry. It is 8' tall and comes in all sorts of different colors. One of the main pluses to riding one is that it can run at 50 mph for a maximum of 4 hours without rest and requires no more than 6 oz. of water afterwards.
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Consistent Across Post-Apocalyptic USA
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Rubble Beetle: A type of beetle that has grown to be 2' long and 1' tall and rolls giant balls of old metal and concrete. By using it's sticky, almost tar like bile, it holds massive amounts of refuse together and rolls it at speeds faster than 50 mph. If threatened, the Rubble Beetle has a serious amount of strength, being able to shoot their refuse boulder forward at speeds reaching 75 mph. Though not naturally hostile, they are known to attack people if they see them scavenging where they've been before.
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Hairy Rhino: A Hairy Rhino is a mutation born from normal Rhinoceroses that escaped from zoos across the West Coast and are now found all across the wasteland. They can go several weeks without water, making them incredibly useful for desert travel.
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