The diagram shows the life cycle of a fish called the salmon. Overall, the process is natural and consists of three main stages: laying eggs, the transition from fry to smolt, and reaching adulthood.
To begin with, the first stage of the process starts in the upper river, which is described as “slow-moving.” Here, salmon eggs are laid among small stones under reeds for around three to six months. As a result, fry are born, measuring between 3 and 8 cm in length.
The second stage takes place in the lower river, where the water flows faster. During four years, the fry grow and become smolts, reaching a length of 12 to 15 cm. After that, they move to the open sea, where they live for about five years and reach adulthood, measuring 70 to 76 cm. As adult salmon, they return to lay new eggs, and the life cycle continues.
