High energy ahead! The small editor of the fishing net teaches you a simple and easy-to-learn trick of watching fish and loading big coffee - calculating the age of the fish pet through the scales.
From the growth pattern of fish, we know that most fish are covered with tiny scales in the first year of life. The scales are made up of many flakes of different sizes, like a cone with an occluded spire, thick in the middle and thin on the sides. The topmost layer is the smallest, but the oldest; the bottom layer is the largest, but the youngest. As the scales grow, new flakes form on its surface, and as the fish ages, the number of flakes increases.
Throughout the year, fish grow at different rates. Usually it grows fast in spring and summer, slowly in autumn, stops growing in winter, and resumes growth the following spring
。 The same is true of the scales, the parts that generate in spring and summer are wider, the parts that are generated in autumn are narrower, and the growth stops in winter, and the thin sheets of different widths and narrows are stacked together in an orderly manner, around the center, one after another, forming many ring belts, called "growth belts". The number of growing bands corresponds exactly to the number of years the fish have experienced.
The broad flakes generated in spring and summer are sparsely arranged, and the narrow flakes generated in autumn are closely arranged, and there is a clear boundary between the first year growth zone and the second year growth zone, called the "annual ring". Fish with more "annual rings" are older, and fish with fewer "annual rings" are younger
Therefore, looking at the scales of the fish, according to the number of "annual rings", you can deduce the exact age of the fish. The actual method is to take a piece of scale of a fish that has grown for many years, put it under a microscope or magnifying glass, and you will see that the surface of the scale has black and white rings, much like the rings on the cross-section of the tree. At this time, just carefully count the number of circles of the black ring stripes of the scales, and add one more, that is, the actual age of the fish. For example, if there are 4 black circles on the scales, the actual age of the fish is 5 years.
You may wish to carry a magnifying glass with you when communicating with aquarists, and easily pretend that the fish master is stress-free~!