Recently discovered in an acidic Indonesian peat swamp, females of the Paedocypris progenetica, a member of the carp family, only grow to be 7.9 mm long. They live in acidic waters and have a see-through body with a tiny vertebrae and unprotected skull. After being discovered in the past decade, it has already been revealed that the species is in danger due to damage caused to their habitat by forest fires and deforestation.