According to the latest research results of French scientists, many organs in fish have biological clocks.
The biological clock, also known as the physiological clock, is the inherent rhythm of biological life activities, through which organisms can sense the periodic changes in the external environment. Scientists' research has confirmed that almost all organs in fish have biological clocks. Since these biological clocks are controlled by light-sensitive substances in the body, they usually adjust automatically according to changes in light.
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