A mixture of oxygen with nitrogen or helium.
Divers dive in the sea/water, not earth.
Air is a mixture of gases in which helium is present in atmosphere.It is mostly present in oxygen tanks used by sea divers and in balloons.
95-98%helium 2-5% Oxygen
do swimers and divers threaten the red sea
By breathing nitrox (gases where the %O2 is higher as compared to air) or mixed gases (e.g. adding in helium) so that the partial pressure of nitrogen is reduced.
because of the sea floor
It's near the right bottom. Above "Divers drawing on an angry sea monster" and "sea lion".
Sea Divers - 1958 TV was released on: USA: 2007 (DVD special edition)
To the right.
Sea turtles are good divers because their fins help them dive into the water and help them move all around strong waters.
plants
Oxygen is used in welding, by the deep sea divers and is also used in hospitals to patients with breathing difficulties.