air, through diffusion of the dissolved oxygen in the water (however, they can survive anaerobically for some time as well)
Octopuses breathe water through gills, not air.
They breathe through breathing tubes that will stick out of the water to get oxygen from the air.
air
Yes, octopuses can breathe out of water. They have gills that extract oxygen from the air, allowing them to breathe when they are not in the water.
Otters can't breathe under water. They're mammals, they breathe air, with lungs. When they dive, they hold their breath.
They use a blow hole to breathe in/out air when the surface the water.
No, the air you exhale is nearly saturated with water vapor. During breathing, air is exposed to the moist tissues of the sinus, trachea, and lungs, and will typically contain substantially more water vapor when exhaled. The only exception would be for air that is already saturated or supersaturated with water.
Dolphins are mammals. They breathe air with lungs, pretty much just like you and I. They can't breathe water. When they dive they hold their breath.
Betta fish breathe air....yes... that's right... they breathe air. They breathe air because they have an organ by their gills that is called the Labyrinth's Organ which allows them to breathe air. They breathe air by coming up to the surface of the water. Then they gather air in their mouths and hold their breath underwater.
That is where it breathe in water and if you blew air into its gill you would drown it in air
No, sharks do not breathe air. They have gills that extract oxygen from the water as it flows over them, allowing them to extract oxygen from the water and breathe efficiently in their underwater habitat.
Yes, gouramis have a labyrinth organ that allows them to breathe air in addition to extracting oxygen from water.