Water Bears

Water Bears, also known as tardigrades and moss piglets, are water-dwelling micro animals. They are are among the hardiest creatures on Earth, capable of surviving dangerous environments such as the vacuum of space and high levels of radiation.

Background
Water Bears appear in the episode "Moss Piglets" as part of Jimmy and Timmy's science fair project. They are shown to enjoy Taylor Swift and are later inadvertently altered by Nathan and Mimsy (who were actually trying to kill them), learning to do the "Hokey Pokey" as accurately as their physiology allows. They are later used by the NFL to fill the seats at Super Bowl games due to declining attendance.

Prominence

 * "Moss Piglets"