The Triop, or Tadpole shrimp is a theoretically immortal creature. When in water, it behaves normally, swimming and eating, but during periods of drought, it shrinks to an "egg", a nonmoving, living ball. It can survive this way for five years, without moving or eating at all. When water returns, it slowly grows back into it's normal forrm. These cruestaceans are commercially sold as "instant pets" much as Brine Shrimp(Artemia Salina) are sold as "Sea Monkeys"
