While it’s interesting to ponder, the consensus regarding Goldfish enjoying music remains inconclusive. They don’t hear sounds in the same way humans do, but they can perceive the vibration and variations in pressure levels caused by music.
Some studies suggest that Goldfish might be capable of distinguishing between different types of music or rhythms, but this doesn’t explicitly imply that they ‘enjoy’ it. Therefore, if you play music around your aquarium, keep the volume low and vibrations minimal to avoid distressing your aquatic buddies.