The shape of fish is often compared to a streamlined or oval shape, which makes it easier for them to move through the water. Since water is the living space for fish, they usually have some special body structures, such as:
Streamlined: Fish usually have streamlined bodies, a shape that helps them swim quickly in the water. This shape also allows water to pass more smoothly around the fish's body, reducing water resistance.
Fins: The fins of fish help them maintain balance and orientation in the water and also help them move and maneuver.
Flattened sides: Some fish such as salmon and cod often have flattened sides, which helps them move quickly through the water and provides some maneuverability.
In general, the morphology of fish is closely related to the physical properties of water, and the streamlined shape of their bodies and functional organs allow them to better adapt to the aquatic environment.
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