Artemia aka Sea Monkey or Brine Shrimp shown hatching, hatched nauplius, at 3 days and a 15-day-old adult. Artemia eggs can remain viable for years without water. Ordered from the back pages of magazines, and rehydrated with salt water for just a few hours, the embryos begin hatching as nauplius larvae. See them hatch, and see the nauplii swim, bob and dart.