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General: Legend says if you can see a mist stalker, it's already too late. These jungle cats are masters of stealth, traveling through both heavy brush and vine-laden treetops with ease. Their greenish-grey coats and dark spots blend perfectly with their habitat, making them difficult to spot even when moving. But their greatest skill is the ability to dissolve into mist at will, allowing them to approach prey or escape danger undetected. While they cannot maintain the mist form for long, it guarantees they always have the upper hand.
Egg: A mist surrounds this egg, making it difficult to see.
Description: Should be indistinct, a darker outline of an egg within a pale fog.
Hatchling: Things have been lively since this cub broke shell. No matter how tightly a place is locked, it always finds a way in (much to the dismay of the Keep's kitchen staff). Anything that moves is fair game for pouncing, and you're almost used to having your feet attacked by now. When startled, it instantly vanishes into mist that drifts behind you, where the cub feels safe enough to reform.
Description: A cub with a pale greenish-grey coat, heavily spotted, and with bits of fog coming off its paws. The cub itself should be bulkier than regular kittens, more like the cubs of big cats like tigers.
Adult: It's hard to believe your scampering cub has grown into the majestic beast beside you now. Fully grown, the mist stalker is as big as a tiger and even more powerful. Fortunately, it is also very friendly and complacent, having been raised among people and other magical creatures. You're pretty sure you wouldn't want to meet one in the jungle, though. Even tamed, your companion still plays at stalking you from time to time, and a wild mist stalker wouldn't be playing.
Description: A large cat, similar to a jaguar or leopard - heavy boned and spotted. The coat itself should be a pale greenish-grey. Either mist should surround the cat, or it's paws/hind quarters can be dissolved into mist.
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Second Submission: Coconut Crab
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General: The coconut crab is the largest land crab known. Unable to swim, they instead spends their time climbing coconut trees looking for their namesake food. They are also very curious, and will investigate anything left unattended too long. A particular fondness for shiny things has also earned them the nickname robber crabs, and wild ones can be very destructive when trying to get to something they want. However, when raised and trained properly by magi, coconut crabs are very sweet and helpful, willing to get hard-to-find reagents and gems for their human friends.
Egg: Is this even an egg? It looks like a coconut, but it feels too light. There's something moving inside...
Description: A coconut, maybe with two long antenna sticking out? Reference image from howtoopenacoconut.com:
Hatchling: So it really was an egg! The hatchling crab is small and has a very soft shell, so it hides under the remains of its egg. You don't think it'll need that protection for much longer though - the claws sticking out are huge!
Description: Part of a coconut shell on top of the crab - should only see the antenna and maybe the face (very lobster-like) between two really, really big claws.
Adult: It's hard to believe this heavily-armored crab once had to hide under an eggshell for protection. It's impressively large, and you've seen it crush rocks in those massive claws. Despite its strength and daunting appearance, the coconut crab is actually very gentle with people and other creatures. It sometimes brings you shiny things it finds, and loves to be tickled on its soft belly.
Description: A coconut crab. This image is all over the net, I can't find the original accreditation anywhere. In addition to this mottled tan/orange look, they come in shades of blue, purple, dark brown, and orange-red, as well as various mixes of those shades:
Edit: concept art for the coconut crab by virusq:
Collecting dragons! Check my keep and PM me your offers.