The given diagram displays the life cycle of salmon.
As an overall perspective, salmon have a lifespan of approximately nine years and a half and their life cycle consists of four stages, from hatching from egg to reaching maturity. Each development takes place in three different places: upper and lower river and open sea.
The first stage is when adult salmon lay eggs in the upper river, where the current is slow. Eggs stay incubated in the stony riverbed covered by the reeds until they are ready to hatch. After nearly five to six months, eggs transform into small salmon or ‘fry’, which measure around three to eight centimeters long.’ The fry then migrate to the lower river where the current is faster. At this point of the cycle, it will spend approximately four years and continue to develop.
After the period has finished, the salmon head to the ocean where they mature into adult salmon, ending up with a total body length of seventy to seventy-six centimeters. They stay there for about five years, before they migrate upstream to their birthplace to spawn, and the entire journey is repeated all over again.