Like in other animals, the sense of taste and smell work together, helps goldfish locate food. The goldfish has a keen sense of touch. But, their sense of touch isn't really that developed. Hearing As you may also notice, when you look at your fish, is that they don't have any ears. So this one way we know that fish some how have a way to hear sound waves.
Fish actually make grunting and squeaking noises during mating, feeding, or during a rivalry.
These noises are heard by other fish to react appropriately. Unlike people, fish hear in different ways. The main hearing organ is in the fish's head. It is an inner hear, that provides balance of sound. But, their hearing organs have no cochlea, but they have a otolith, a hard stone, that transmits sound waves throughout their body.