It is natural for fish to swim in any direction and and at night time when there is no light from the moon they go into direction in surfaces where artificial light is present. Their biological requirement for oxygen directs them to swim counterflow to the source of current that is normally loaded with high amount of dissolve oxygen .
Yes. Other fish do this behavior too. When there is more nutrients and food upstream they will go here. The also move upstream to migrate to breeding grounds.
Answer2: In addition to the other comment, I read such an interesting article on the brook trout. According to a study published in Science magazine, brook trout and other varieties of fish exploit turbulent flows swirling around stationary objects in the water to minimize effort and give themselves an energy-saving boost current. By alternating their body position and synchronizing movements with the eddies they encounter, says New Scientist, trout save so much energy that they do not have to use their main swimming muscles." It's a very low-energy way of moving through a turbulent environment," explains one of the authors of the study George Lauder, a biomechanician at Harvard University. In effect, says New Scientist, "the fish were bending their bodies into wing-like hydrofoils to catch the eddies, like a sailboat tacking upwind.
salmon swim upstream to get back to where they were born to reproduce.
All fish swim downstream at times just as all fish swim upstream at times. It all depends on where they wish to go.
Salmon swim upstream to reproduce
anadromous (as opposed to catadromous)
yes
salmon
August til November
Salmon swim upstream to live out their adult lives. The thing that helps them to swim upstream is purely will power and instinct. They are taught all of their lives to swim to the ocean when they are adults and return to the river where they were born to give birth and die.
Salmon swim upstream to live out their adult lives. The thing that helps them to swim upstream is purely will power and instinct. They are taught all of their lives to swim to the ocean when they are adults and return to the river where they were born to give birth and die.
Salmon swim upstream to live out their adult lives. The thing that helps them to swim upstream is purely will power and instinct. They are taught all of their lives to swim to the ocean when they are adults and return to the river where they were born to give birth and die.
Salmon swim upstream to live out their adult lives. The thing that helps them to swim upstream is purely will power and instinct. They are taught all of their lives to swim to the ocean when they are adults and return to the river where they were born to give birth and die.
Swimming upstream is to do something the hard way. It is more difficult to swim against the current. Salmon swim upstream in order to spawn.
Salmon swim against the current to get to their breeding spot where they were born.
Fish swim upstream by powerfully thrusting their tails to counteract the current. They are then able to slowly but surely travel upstream.
mostly swimming with the stream but during breeding season they will swim upstream
Salmon fish get food from the river beds. They will eat the algae, small organisms and other fish. They in other words clean the river as they swim upstream.
they usually swim in ocean, but when they born, get eggs, they go back to the same spot where they were born, which can be top, middle, or bottom.