When you do the commando /setblock x y z minecraft:(color)_coral_plant the block will be placed with a water block around it.

When you do the commando /setblock x y z minecraft:(color)_coral_plant the block will be placed with a water block around it. I guess this makes sense if you are using the commando underwater, because the water then might not wanna update, but i fink it is a little bit annoying for my maps :/
-CyBer00t