Sea Dragons (TWatWK Spoilers)

How do you think the Sea Dragons stand? Because it seemed like they only have two legs.

This was my first thought, for them to stand similar to people.

Then there's this. The wings are only there to make sure it doesn't fall over. the actual dragons would be able to stand without using their wings.

because otherwise they would look like this.

Or like this?

(without the hand)