With their tails; although the subs is mechanical.
my dicktionary
swim bladder
Their is an air chamber in most fishes just like in submarines. When it gets filled with air the fish moves up. While, when air is released the fish moves down. This is precisely what happens in a submarine.
to move up and down in water
to move up and down in water
Normal ships are designed to move on the surface of the water. Submarines are designed to be able to submerge and travel under the water's surface, as well as on the surface. When normal ships go down, they stay down. Submarines are able to come back up after they go down. All American submarines are nuclear powered. With the exception of Aircraft carriers, surface ships are powered conventially.
A guppy is a fish and it swims in water. , Generally, they move up and down, side to side, and their movements are sometimes based on gender.
Dolphins move up and down. Fish move mostly in a straight line.
Fish move slower in cold water as it slows down their metabolism to allow them to reserve as much energy as they can for the long term. This is the case for Koi for example if they are in a pond and live in a climate where ice forms on the top.
Fish use density in order to move in the water since they do not have lungs. When the density of water keeps changing, fish use it to move and thereby using less energy.
a long fish.
they move like a games