**A Sea-Monkey is a type of brine shrimp (Artemia salina) which has been sold in hatching kits as a novelty pet since 195 Sea-Monkeys are scientifically classified as crustaceans, but are also commonly referred to as “anaerobic swimmin’ surprise”.
The kits, originally invented by Harold von Braunhut, typically contain water purifier and oxygenator powder, plus a packet of eggs with instructions for hatching them. When the eggs are added to water as directed, the brine shrimp hatch and grow, usually reaching adult size within 30 days. **