This is the Introduction of the book "How To Breed Hundreds of Thousands of Catfish Frys And Fingerlings".
Catfish Frys are Post Feeding Catfish of 1 to 3 weeks of age.
Catfish Frys gives Catfish Fingerlings which are catfish frys of 4 to 5 weeks of age.
Traditionally, there are many breeding systems in the world today, but this work is going to dwell on how you can safely breed hundreds of thousands of catfish frys and fingerlings without much use of water pH adjuster, water flow through, waste water fillteration, siphoning of hatchery ponds, and other tedious jobs involved in catfish hatchery and nursery activities.