what is fish farming?

In this article, we will concisely define fish and its benefits, so stay tuned to the Farmidarena site until the end of this context.
Most of us have probably seen fish, but how much do we know about this useful creatures?
The fish is an aquatic vertebrate that needs gills and fins to swim.

All fish have two property in common
They can only live in water and have a spine (they are vertebrates).
These beautiful creatures reproduce by spawning , live in hot and cold waters, deep oceans and even rivers.

Fish History:

Historically, the first vertebrates that formed about 480 million years ago were fish.
About 320 million years ago, when the golden age of fish began and aquatic animals were the best and most advanced living organisms in the world,
the density and expansion of fish was at its peak.

The first fish to emerge were the jawless fish, whose fossils are found in sediments in Devine, a coastal area in England.
Later in the same period, the first jawed fish, which are actually the main ancestors of modern sharks, emerged.
In the late Devonian period, bony fish appeared.
Today’s fish are the result of evolutionary changes.

Physical structure of fish:

The appearance of the fish is spindle and if we make a cross section in it, we will see it in an oval shape.
Some of these creatures can be round, wide, striped, thread-like, snake-like, and so on.
Fish have a hard cover that protects all parts of their body.

Even their eye sockets are protected by this cover and have a light color.
The skin, muscles and organs of fish are protected by scales.
The size of the scales can be as small as a microscope or the size of a coin. The scales are placed around the body of the fish in a circle.
Fish can be colorless or colored.