yes because they have bones
They swim
bony fishbony fish.
swim bladder.
Bony fish have a swim bladder that helps them regulate their buoyancy and control their depth in the water. By adjusting the amount of air in the swim bladder, bony fish can increase or decrease their buoyancy, allowing them to float or sink as needed.
swim bladder.
Basically, any fish with a swim bladder and movable pectoral fins can swim backward (bony, ray-finned fish).
swim bladder is what helps the fish stay afloat without the swim bladder a fish would simply sink duhhh
swim bladder
so they can release gas out
That would be the swim bladder.
The Osteichthyes is evolved from lungs of early bony fish. The fish have many types of evolved.
Scales