Do fishes have hearing?
The otolithic end organs are involved in hearing in all fishes, through the detection of particle motion (Popper and Hawkins, 2018). In some fishes, sensitivity is also shown to sound pressure through the coupling of a gas-filled body (e.g., the swim bladder) to the inner ear (e.g., Poggendorf, 1952).
Can fish hear what you say?
Conclusion. Not only can your aquarium fish hear you speak, but they can also respond to certain sounds, differentiate different types of music, and speak back to you through their body language.
Can fish hear or see you?
They can and will see you if you do not take care in your approach and your presentations to them. Once you’re spotted and one fish spooks, they will send alarm bells to all the rest of the fish in the spot and your chances of catching a spooked fish are zero.