Actually, yes you can. It will affect the range of of the bullet and the lethality, and may possibly cause the gun to malfuction, but it can be fired underwater.
yes but it wont be as powerful
No
You can, but, DON'T. It is unsafe for most guns.
no you will mess your gun up if you shoot it under water and the c02 is not cold enough
Depending on the type, it might have a catastrophic failure
You can shoot MOST animals w/ guns. You can shoot anything from a mouse to a elephant. You can't really shoot whales or any BIG under water animals. You can harpoon smaller fish.
Water.
At a shooting range is usually the best choice.
In the Unites States you have to be 18 to purchase a pellet or BB gun, but you can be any age to shoot it under adult supervision.
With a gun what els would you use a water gun
That depends on how quickly the firer is able to shoot and reload.
shoot it with a gun and brake it with an axe and remove it by your hand