That really depends on the type of sea turtle. I know that the Loggerhead Sea Turtle spends it's early life relatively close to shore until they are matured and then they move farther out. When they are at their adult stage they live at the bottom and occasionally come to the top. Females of course come ashore to lay eggs.
They grow above ground. It is a stem plant.
Below ground
They live above ground.
A Swede grows below ground.
above - sky as below - ground above - airplane as below - subway
Below ground, just like a carrot.
Above the ground
above.
Cabbage grows above ground.
Above ground. It is a flower.
Above ground as the oat plant is like wheat.
Yes. with the exception of the part below ground such as the coal mines. I think you may be asking if its above or below sea level. It is above.