This technical guidance factsheet was developed as part of a series of practical on-farm hatchery management guides based on the FAO Artemia Manual. It provides a concise, user-friendly reference for hatchery operators on the hatching of Artemia cysts to obtain high-quality instar I nauplii. The factsheet summarizes the key operational parameters affecting hatching success, including cyst density, aeration, salinity, temperature, pH, illumination and incubation duration. It also highlights the materials required, recommended operating ranges and critical monitoring points to help ensure optimal hatching performance and consistent nauplii production under hatchery conditions. Presented in a highly visual format, the guide transforms the detailed information contained in the FAO Artemia Manual into a practical tool that supports the safe and effective production of high-quality Artemia for aquaculture hatcheries.