Can you correct the mistakes in the following six sentences?
- Salmon begin their lives from eggs that laid in a river.
- After emerged from eggs they reared to freshwater.
- Before they merge to sea they stay in estuary, where sea and river meet.
- During their time in the ocean, young salmons develop gradually into mature salmons.
- The adult fishes travel to spawning areas where the salmon incubation can be done.
- Their cycle completes when the spawning process starts and as some research, adult salmon die right after that due to exhaustion.