Tell us about the arowanaâaka the dragon fishâand why it has become so valuable. The Asian arowana is the worldâs most expensive aquarium fish. It is a tropical freshwater fish from Southeast Asia that grows three feet long in the wild. Thatâs roughly the size of a snowshoe. [Laughs.] It is a fierce predator dating back to the age of the dinosaurs.
A personality disorder is an enduring pattern of inner experience and behavior that deviates markedly from the expectations of the individual's culture, is pervasive and inflexible, has an onset in adolescence or early adulthood, is stable over time and leads to distress or impairment.
Clinical psychology. Clinical psychology is an integration of science, theory and clinical knowledge for the purpose of understanding, preventing, and relieving psychologically-based distress or dysfunction and to promote subjective well-being and personal development.n many countries, clinical psychology is regulated as a health care profession. The field is often considered to have begun in 1896 with the opening of the first psychological clinic at the University of Pennsylvania by Lightner Witmer.