This document provides information on several professions related to water, including divers, lifeguards, hydro engineers, fishermen, plumbers, ship captains, and marine biologists. It outlines the basic duties of each profession and discusses both positive and negative aspects. Positive aspects include exciting work, travel opportunities, job stability, and contributing to public welfare. Negative aspects range from physical dangers and long hours to pressure, difficult clients, and risks of falling overboard or sea sickness. The document also lists some famous people associated with each water-related profession.