The diagram illustrates various stages in the development of a salmon.
Overall, there are eight stages in the life cycle of the salmon, starting with eggs and continuing until they become fully-grown adults.
At the first stage in the life cycle, the female salmon chooses the best spot in rivers and lays a massive number of eggs, which are then incubated before developing into tiny fish. At this point, the fish have a long tail and do not yet have the appearance of a normal fish. In the next stage, the fish grow quickly in size and move downstream to freshwater areas, which are suitable for rearing, before migrating to estuaries where they continue to be reared.
At the following stage in the life cycle, the young fish become much bigger and begin their journey to the ocean where they develop into mature adult salmon. The adult fish migrate upstream to spawning areas of rivers where they will mate and spawn, and the life cycle starts again
