Brine shrimp
Adult female brine shrimp ovulate about every 140 hours. In favourable conditions, the female brine shrimp can produce eggs that almost immediately hatch. But in extreme conditions, such as low oxygen level or salinity above 150‰, female brine shrimp produce eggs inside cysts. They are metabolically inactive and can remain in total stasis for two years in dry oxygen-free conditions, even at temperatures below freezing. While in cysts, brine shrimp eggs survive temperatures of liquid air () and a small percentage survive above boiling temperature () for up to two hours.