Answer:
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
Four fingers and a thumb, yet flesh and blood I have none. What am I?
you hold my tail while I fish for you
If you lose me, you may cause people around you to lose me too. What am I?
I have cities without people forests without trees and oceans without water. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.