I think there'd have to be occasional cases where two different species mate and create a cross-bred type creature. Like certain random features from each side. :D Wouldn't that be okay, or is it too farfeched?

I'd say it depends on the creatures. Certain creatures on earth can cross-breed - sometimes it is simply too much of a difference. I'm not sure how close it needs to be on Felarya. I'm sure that humans and neko's could cross-breed...and fairies will probably at least try to cross-breed with everything...

It'd probably be along the line of genetics, so basically if the two species have a similar makeup, wether it's in terms of general body characteristics or inner-body workings, it'd work. So anything that typically has a human-type body shape and inner workings should be able to cross-breed, so humans, nekos, faries and anything else that fits in there could, I think. But it just an idea. :3

coll....

Personally, I'm not much a fan of cross-breeds. Then again, that's mostly because many of them make no sense.

There are two main issues I see with cross-breeding: Size and genetics.

Size has the obvious issues. A Naga is unlikely to be able to mate successfully with a human unless either: A) It's genetically extremely short (In which case the child would likely be as well if it's to inherit most of the genes from the Naga), or B) It's not developed enough to even yield children.

Genetics, well, that's also relatively simple and complex. First, many animals cannot mate with another unless they extremely close. Extremely. I could see a Dridder mating with a Dridder of a different type (provided #1 doesn't become an issue). However, those children would likely be sterile.

I see these as the potential matings for the main races outside their own species:

Angel: None
Centaur: Sphinx
Chlaenas: None
Dridder: None
Dridder (Naxyla): Centaur, Dryad, Elf, Fairy, Harpy, Human, Naga, Neko, Sphinx
Dryad: None (outside maybe Fairy)
Elemental: None (Unless bound to host, which would likely yield host DNA, not Elemental)
Elf: Fairy, Human, Neko
Fairy: (Maybe) Dryad, Elf, (maybe) Harpy, Human, Neko
Harpy: (Maybe) Fairy
Human: Elf, Fairy, Neko
Mermaids: (Maybe) Naga
Nagas: (Maybe) Mermaid
Neko: Elf, Fairy, Human
Sphinx: Centaur
Succubi: None

Where I put (maybe), I mean that I feel it less likely than the other cross-breeds stated but still could be a possibility above 0%. Reason why many categories don't cross with Naxyla is because the Naxyla instead shifts the host into a new Dridder. Because of this, it's possible for them to change another and create a 'hybrid' but typical procreation would likely fail to work.

Hybridization of any two species it probably possible if enough magic is used to "patch things up".

And really, who WOULDN'T want a half fairy, half naga, half candy cane elemental?

Fairy/Naga hybrid? Could it get any more dangerous?

Nobody even commented on vampire-nekos. :( I feel ignored.