Artemia nauplii hatch approx. 20 to 24 hrs after being incubated. After complete hatching, the Artemia nauplii are harvested. Using the ZEBCARE Artemia harvesting sieve 110 mm, harvesting Artemia is easy. The sieve, with a volume of approx. 1 liter, is equipped with a 100 micron stainless steel mesh bottom preventing the Artemia nauplii from escaping.