What is the most important sense that a cave fish have?

The most important sense that a cave fish typically relies on is its lateral line system, which is a sensory organ that detects vibrations and changes in water pressure. Since cave fish often live in complete darkness, they have adapted to their environment by losing their eyesight and enhancing their ability to sense movement and navigate through their surroundings using this lateral line system. This adaptation allows them to effectively find food and avoid predators in the murky cave waters.