Artisanal fishing is an ancestral craft passed down from father to son. It is a hard work, and every day it is more difficult to sustain; industrial overfishing, marine pollution, global warming, etc.
They go out to fish at 3 in the morning, their boats are no more than 10 meters long, often in conditions that not even the best trained astronauts could withstand.
Experience and instinct are their daily assets. Once the nets are in the sea, the die is cast. If there is no catch, it's a matter of holding on for dear life and expenses. Tomorrow will be another day. Or not.