When salmon make their challenging way upstream to reach their spawning grounds, they use up all their energy, and their bodies start to shut down. This process results in fish that are rotting alive, hence the term zombie salmon.
While both species belong to the family of salmonids and can be found in saltwater, steelheads are rainbow trout and hence not a salmon species. Steelhead fillets are generally darker than most salmon fillets. The larger fish of the two is almost always the salmon.
Atlantic and Pacific salmon belong to the same family of fish but have different genera, making them separate species. While the Pacific chinook salmon is bigger than the Atlantic salmon, it is the wild Atlantic salmon that tends to taste better than the Pacific salmon types.
teelhead and rainbow trout are the same species of fish but live a much different life after hatching. A rainbow trout will stay in freshwater streams while a steelhead will leave freshwater and spend a portion of its life in saltwater until returning to its freshwater spawning grounds to breed.
In total, there are six main types of salmon in the world. They include the five Pacific species king, sockeye, chum, coho, pink salmon, and the one Atlantic salmon species.
Salmon enter fast-flowing freshwater systems and swim up their natal rivers to find a suitable spawning location. The rivers’ running water and habitat provide both plenty of oxygen and shelter for the eggs and juvenile salmon, which increases their rate of survival.