In the intricate cycle of salmon life, the term "alevin" marks a critical phase that is both fascinating and essential to understand. Alevin refers to the early developmental stage of salmon immediately after they hatch from their eggs. At this point, these tiny creatures are still developing and rely on the yolk sac attached to their bodies for nutrition. This yolk sac provides all the necessary nutrients for the initial growth and development of the alevins.

During this period, alevins remain hidden in the gravel beds where their eggs were laid, offering them protection from predators. They do not require any external food source during this time, as the yolk sac serves as their sole source of sustenance. This stage is crucial because it sets the foundation for the salmon's future development and survival.

As they grow, alevins eventually absorb their yolk sacs completely and emerge from the gravel as fry, ready to begin their journey towards adulthood. Understanding the alevin stage is vital for conservation efforts aimed at protecting and preserving salmon populations, ensuring the continuation of this remarkable species.