Trout Cam - Watch our trout grow!

Ever wondered what the life cycle of a trout looks like? Check out our trout cam to see it in action!

Life Cycle of a Rainbow Trout

EGG: Trout eggs have black eyes and a central line that show healthy development. Egg hatching depends on the water temperature in an aquarium or in a natural habitat.

Alevin: Once hatched, the trout have a
large yolk sac used as a food source. Each
alevin slowly begins to develop adult trout
characteristics. An alevin lives close to the
gravel until it “buttons up.”

Fry: Buttoning-up occurs when alevin
absorb the yolk sac and begin to feed on
zooplankton. Fry swim close to the
water surface, allowing the swim bladder
to fill with air and help the fry float
through water.

Fingerling and Parr: When a fry grows to 2-5 inches, it
becomes a fingerling. When it develops large dark markings, it then becomes a parr. Many schools that participate in the Trout in the Classroom program in Nevada will release the Rainbow Trout into its natural habitat at the fingerling stage.

Juvenile: In the natural habitat, a trout
avoids predators, including wading birds
and larger fish, by hiding in underwater
roots and brush. As a juvenile, a trout
resembles an adult but is not yet old or
large enough to spawn.

Adult: In the adult stage, female and
male Tasmanian Rainbow Trout spawn
in autumn. Trout turn vibrant in color
during spawning and then lay eggs in fish
nests, or redds, in the gravel. The life cycle
of the Rainbow Trout continues into the
egg stage again.


for more information:

406.457.1800 ext. 1