Madness string 83

Random mermaid
...Mark. I'll call him Mark. Such a good boy... such a... good boy.
Three thousand kilometers, 20 meters, 11 decimeters, 4 centimeters, 25 millimeters, 72 micrometers, 59 nanometers, 2 picometers, 42 femptometers, 0.17 attometers, 97 zeptometers, and 1 yoctometer.