The diagram describes how the salmon grow and reproduce from the salmon eggs.
Overall, there are 3 main stages in the life cycle of a species of large fish called the salmon starting from salmon eggs to fully grown individuals. This cycle lasts for approximately 10 years.
At the first stage, mature fish lay eggs at the upper river where the water flowing is slow. The eggs are surrounded by reeds and small stones for protection and will be there for around 5 to 6 months until they hatched. The newborn fish are called the “fry” which is lengthened from 3 to 8 cm. When the fry are hatched, the fish will follow the fast-flowing water to the lower river and stay there for the next 4 years.
Once these small salmon reach the length of 12 to 15 cm, which they are now called the “smolt”, will then migrate to the open sea. The smolts will be staying at the ocean for roughly 5 years and reach their full maturity at 70 to 76 cm long, which is about 10 times bigger than when the fish were newborn, and become “adult salmon”. These large fish will eventually swim back to their birthplace, and finally enter the reproductive phase to start the cycle again.