No they cant really control gravity anyway...
fish maintain buoyancy usind a organ near there gills wich fills with oxygen and keeps the fish afloat
stress?
The fish gains buoyancy and is able to rise in elevation .
swim bladder
they have an organ called a swim bladder. it is a buoyancy device
fish need to move through three dimensions and their buoyancy has to adjust so the fish can swim efficiently. they also create different pressures with their fins so they can maintain a certain depth in the water.
Fish have an gas-filled, internal swim bladder, whose buoyancy they regulate to keep from sinking or rising in the water.
They have organs called swim bladders, which balance the fish and keep them from floating.
The similarity lies in their use - the control of buoyancy.
Buoyancy
The Osteichthyes is evolved from lungs of early bony fish. The fish have many types of evolved.
Only when they drive really fast submarines...Actually, fish have what is called a swim bladder; this is what helps them with buoyancy, and to stay upright in water. When there is a problem with their swim bladder (or they are constipated!) they will have buoyancy problems, and in many cases, get stuck swimming upside-down.