Memoir about her younger years, when Eugenie Clark as a budding marine biologist travelled the world's oceans to collect fishes for science. It starts with how her interest in fish was sparked by long days spent at a public aquarium while her mother was working, and she pursued this into university studies. She describes first learning to dive, to use different netting techniques, and most of all, to track down individual fish and capture them with a spear. Her travels for study took her to the South Sea Islands where native fishermen would help her find rare fish. Even when language was a barrier, her requests were usually met with enthusiasm. Many of the natives she met had never seen a white woman before, much less one who was a scientist and went fishing.She made careful inquiries of the locals at each island which fishes were good eating (and often sampled them, including raw) and which they assumed were poisonous, and sent samples off to a lab which tested them for poison. It was a survey to find out which fish naturally carried venom, which were only poisonous in certain locales or at certain times of year due to what they ate, and which were not poisonous at all, even though the locals assumed so. At different times she was stationed in marine laboratories, and describes several extended stays in Hawaii, Guam, and on the Red Sea. She explains some experiments done on captive fishes in the lab- to study for the first time the reproductive behavior of guppies, and to learn more about visual memory using marine gobies. Those were pretty interesting. Sharks also come into the book, at the very end when she also talks briefly about meeting her future husband Ilias.