They have gills under their mouths that allow them to breathe. When the gills start to dry out, foam forms at the mouth, telling you that the crab has trouble breathing.
Whales use the mouth and blowhole to breathe.
They use lungs and gills.
Marine crabs breathe underwater using gills, which are located in a two cavities under the carapace. True land crabs have enlarged, modified cavities that act like lungs so that the land crabs can breathe air
fish breathe using an organ on the sides of their bodies that allow them to turn water into air, then when the air is used they let it out, just like we do!
It is a gill chamber.
Of course they do! Unless the crab is dead.
crab
Yes, they breathe to extract oxygen from the water like a fish.
Their lungs.
The cobra uses lungs to breathe, just like every other land dwelling animal. They are creatures that live on the land, so they must use lungs to breathe.
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.