No.

When a small flounder is just born, it is like an ordinary fish, with eyes on both sides of its body. When it grows to about 20 days old and is about 1 centimeter long, its body begins to tilt, swim sideways, and live lying on its side. The eyes below it began to gradually move upwards driven by the soft band under the eyes, and after the eye bones appeared, they were fixed on the same side of the body.