The article explores the reasons behind the affordability of canned tuna, a staple in many households. It delves into the history of tuna fishing, tracing its origins to the early 20th century when the industry was centered in Southern California. The advent of new fishing techniques, such as purse seining and the use of sonar, revolutionized the industry, allowing for larger catches and increased efficiency. However, this also led to overfishing concerns and the implementation of regulations to protect tuna populations. The article also discusses the role of canning technology, which made it possible to preserve and distribute tuna globally. Additionally, it examines the economics of the industry, including the use of low-cost labor in processing plants and the impact of subsidies on keeping prices low. The article concludes by highlighting the environmental and ethical considerations surrounding the tuna industry, such as bycatch and sustainable fishing practices.