Answer:
When it comes in, From sea to shore, Twenty paces you'll see, No less, no more.
What hangs others yet can unintentionally hang itself?
Pregnant every time you see her, yet she never will give birth.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
Halo of water, tongue of wood. Skin of stone, long I've stood. My fingers short reach to the sky. Inside my heart men live and die.
I am your mother's brother's only brother in law. Who am I?