What is the function of the lateral line of a perch?

The lateral line of a perch allows it to detect vibrations caused by both predators that threaten it, such as hawks, and prey that it might want to eat, such as minnows. The lateral line also helps the perch detect changes in the current and in the water pressure.

The vibrations and changes are detected by receptors called neuromasts, which are found in the bones of the fish's head, in bodily canals and in a canal that runs along the side of the body. Neuromasts, which are interconnected, are found beneath the perch's scales but access the exterior of the fish through special pores.