When tilapia eggs hatch, the larvae rely on the yolk sac to provide the nutritional needs before they begin feeding.

In nature, a constant feed supply is not guaranteed, and many fry die. In hatcheries however, sufficient amounts of high quality starter feeds can be continuously supplied, providing all fry with an equal opportunity to feed, ensuring a very high survival rate.

Tilapia are still vulnerable at this life stage; small in size and not completely developed physiologically. The immune system is still in its infancy, and vaccination and transfer from hatchery to nursery sites can cause stress.

Tilapia are now fully developed. As females tend to grow less well and mature early, industry practice is to use all-male populations. Optimal nutrition for the right size fed at the right time is key to maximize growth and feed efficiency. Optimal farming conditions contribute to better performance and survival.