How do salmon go from freshwater to saltwater?

Answer 1

The cells take in salt to balance the solute concentration-apex

Answer 2

== == Salmon are not adapted to fresh water. Salmon live in the ocean. They swim upstream and are capable of surviving only for the brief period of time it takes to swim to their spawning grounds. Actually, salmon ARE adapted to both fresh and saltwater, but at different life stages. When salmon are born, they are born in freshwater and they are completely adapted to freshwater. Then they make their migration out toward the ocean. In the estuary (where freshwater and saltwater mix), they undergo a major life change called smoltification, which prepares them for life in salt water. Young salmon may spend up to several months making this change in the estuary. But after they have become smolts, they are adapted to salt water, and they will begin their life in the ocean, which may take several years, depending on the species.

After this, they will return to their birth streams or lakes to spawn. The freshwater journey back to their spawning grounds is pretty rough. They do not feed on this journey. They are entirely focused on spawning, after which they will die.

Answer 3

98% of Freshwater Fish will die if they are put in saltwater. (But some fish have to move to the strings where they were born to give birth to the new generations - for example salmon or eel.)

Answer 4

They swim downstream until they reach the river estuary and then continue on out into the ocean. No-one knows exactly what happens then.