In the natural world, the concept of "big fish catch small fish" refers to the ecological phenomenon where larger predatory fish prey upon smaller fish as part of their diet. This relationship is a fundamental aspect of aquatic ecosystems, where larger fish species serve as top predators, exerting control over smaller fish populations. Predatory fish, such as sharks, tuna, and groupers, rely on their size, strength, and specialized hunting techniques to capture and consume smaller fish species. This dynamic plays a crucial role in maintaining the balance of marine food webs, regulating the populations of both predator and prey species. Additionally, the "big fish catch small fish" concept extends beyond literal interpretation to symbolize broader themes of competition, hierarchy, and survival in natural systems.