Also another fun fact: not all tardigrades are capable of going into the tun state. For example, aquatic tardigrades that live in freshwater streams can form what is called a summer egg, which allows them to survive hot and potentially dry conditions, but I don't believe much has been studied on this alternative state. IIRC marine tardigrades also cannot achieve the tun state, so this really only applies to terrestrial^*^ tardigrades.
^*^Terrestrial tardigrades are also sometimes referred to as aquatic tardigrades as they are only active (not in the tun state) in the presence of water (e.g., after it rains)