How Long Do Salmon Eggs Take to Hatch ?

Salmon eggs take approximately 45 to 75 days to hatch. The time period depends on the water temperature, with colder temperatures causing a longer incubation period. hatchery-reared salmon usually have their eggs artificially incubated.

Salmon eggs typically take between 45 and 75 days to hatch, depending on the water temperature. The process begins when a female salmon lays her eggs in a gravel nest, or redd. A male salmon then comes along and fertilizes the eggs.

Once the eggs are fertilized, they develop into embryos and begin to grow. As the embryos develop, they absorb the yolk sac that provides them with nutrients.

After about 30 days, the yolk sac is gone and theembryos must now feed on their own.

Around this time, they also start to develop eyes and fins. By 45 days, most of the embryo’s body has formed and they look like miniature versions of adult salmon. At this point, they are called fry.

The final stage of development is when the fry leave their gravel nests and head out into open water to start feeding on their own.

Salmon Life Cycle

Salmon are anadromous fish, meaning they live in freshwater but spawn in saltwater. The life cycle of a salmon begins when the female lays her eggs in a gravel nest called a redd.

After the eggs are fertilized by the male, they hatch and the resulting alevins live off their yolk sacs for several weeks before emerging from the gravel as fry. The fry then spend several months feeding and growing in freshwater before migrating to saltwater to begin their adult life.

After spending one to five years in the ocean, mature salmon return to freshwater to spawn. This journey back upriver is called “smoltification” and during this process, the salmon’s body chemistry changes to adjust to living in saltwater.

Once they reach spawning grounds, males and females pair off and once again the female excavates a redd where she will lay her eggs.

After fertilization, incubation takes place and anywhere from 30-90 days later, depending on species and water temperature, hatching occurs and the cycle begins anew.

How Many Days Does It Take for a Salmon Egg to Hatch?

Salmon eggs typically hatch within 50 to 60 days after being deposited in the gravel of a streambed by the female salmon. The length of time it takes for hatching can be influenced by water temperature, with warmer temperatures generally resulting in shorter incubation periods.

After hatching, young salmon (known as “alevin”) spend several weeks absorbing their egg sacs before emerging from the gravel and beginning to feed on their own.

How Many Salmon Eggs Will Survive?

It is estimated that only about 10-15 percent of salmon eggs will survive to adulthood. The main cause of death for salmon eggs is predation by other animals, such as trout, sculpin, and crayfish. Salmon eggs must also contend with parasites, diseases, and poor water quality.

Some of the factors that determine how many salmon eggs will survive include the species of salmon, the age and size of the female fish, the number of eggs laid, and environmental conditions.

What Do Salmon Eggs Need to Hatch?

Salmon eggs need several things in order to hatch.

Most importantly, they need a suitable substrate in which to bury themselves. This can be anything from gravel to sand, and the female salmon will often choose a spot with just the right mixture of these materials.

The eggs also need a steady supply of oxygen, which they get from the water flowing over them.

Finally, salmon eggs must be kept at a constant temperature; too cold and they won’t develop, too hot and they’ll die.

How Long Do Salmon Stay As Eggs?

Salmon eggs can stay in their freshwater habitat for up to three years before they hatch. The length of time that salmon eggs remain in their environment depends on the water temperature and the amount of oxygen available in the water.

Salmon eggs typically hatch within two weeks to two months after being deposited in a suitable location by the female salmon.


It takes salmon eggs around 75 days to hatch. The process begins when the female salmon lays her eggs in a gravel nest, or “redd.” The male then fertilizes the eggs and both parents use their tails to sweep away any debris that could potentially harm the developing embryos.

After the eggs are fertilized, they remain in the gravel for several weeks as they absorb nutrients from the yolk sac and develop into fry.

When they are ready to hatch, the fry use an egg tooth to break out of their eggshells and make their way into the water where they will continue to grow and mature.

Rod Romeo
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