cobra vs. dog

What exactly is the difference between cobra (or maybe it's baby cobra) and up dog?

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"When you see a good move wait - look for a better one."
- Emanuel Lasker

In cobra the hips and legs remain on the floor. In baby cobra the hips stay on the floor all the way up to the height of iliac crest.

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Consider Phlebas, who was once handsome and tall as you
High mountains are a feeling
I don't need to sell my soul, he's already in me

So in up dog the hips actually leave the floor? I wasn't aware, thanks John!

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"When you see a good move wait - look for a better one."
- Emanuel Lasker

Some teachers will keep beginners in cobra and call it up dog till they are ready to lift without putting the back bend into the lumbar but in up dog only the hands and feet should touch the floor.

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Consider Phlebas, who was once handsome and tall as you
High mountains are a feeling
I don't need to sell my soul, he's already in me

from yoga poses

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grapple - looks like an apple tastes like a grape