Many animals can sometimes survive submersion for a few hours or days. But this is nothing compared to the tiny northern pseudoscorpion (Wyochernes asiaticus), an arachnid (a group including scorpions, spiders and mites) that can survive underwater for weeks without breathing. During laboratory experiments, some survived for more than 17 days. We do not know exactly how he does it, but he is likely to be able to temporarily disable some of his bodily functions.
There are more than 3,000 known pseudoscorpions, but we still know very little about them.