What do fish hear through?

Here's how it works:

* Lateral Line System: Fish have a special sensory system called the lateral line that runs along the sides of their body. This system detects vibrations in the water, which helps them navigate, find prey, and avoid predators.

* Inner Ear: Inside the fish's head, they have an inner ear that is similar to the inner ear of mammals. This structure contains a series of fluid-filled chambers and tiny bones called otoliths.

* Sound Detection: When sound waves travel through the water, they cause the otoliths to vibrate. These vibrations are then picked up by sensory cells in the inner ear, which transmit the information to the fish's brain.

So, while the lateral line helps with detecting vibrations, the inner ear is the primary organ for hearing sound in fish.