Some kinds of fish are born in rivers, but swim away from the place they were born and live their lives elsewhere. When they are ready to reproduce (spawn) they swim back to where they were born to lay eggs or fertlise them. So they migrate downriver to live, and migrate back upriver to spawn.
Salmon are not exclusively freshwater fish. They are anadromous, meaning they are born in freshwater, migrate to the ocean to grow, and then return to freshwater to spawn.
Anadromous: Relating to fish, such as salmon or shad, that migrate up rivers from the sea to breed in fresh water.Catadramous: Migratory pattern in which juvenile fish spawn in the open ocean but mature in freshwater.
Salmon is a type of fish that can live in both rivers and seas. They are born in rivers, migrate to the sea to grow, and then return to rivers to spawn.
Salmon are anadromous fish, meaning they are born in freshwater, migrate to the ocean to mature, and then return to freshwater to spawn. They can thrive in both freshwater and saltwater environments.
Salmon are anadromous fish, meaning they are born in freshwater, migrate to the ocean, and then return to freshwater to spawn. They can thrive in both saltwater and freshwater environments.
Salmon are born in fresh water, migrate to the ocean and then return to the fresh water to spawn. Salmon have the reputation of returning to the same place they were born in order to spawn.
Salmon are anadromous fish, meaning they are born in freshwater, migrate to the ocean to grow, and then return to freshwater to spawn. They can thrive in both freshwater and saltwater environments.
Salmon are anadromous fish, meaning they are born in freshwater, migrate to the ocean to grow, and then return to freshwater to spawn. So, they can live in both freshwater and saltwater environments.
Digging holes is just something many cichlids do. It may mean the fish is getting ready to spawn but in the case of the (Laboratory made) Parrot cichlids, it is unlikely you will get fertile ova if they do spawn.
The answer is spawn
fish that can spawn up to 100,000 eggs each spawn
Some fish migrate. Except for the monarch, most butterflies do not migrate.