Swedish authorities order nightclub to turn down volume ... for the sake of the fish!
According to their laws, noise must not exceed 65 decibels if pet animals, which includes fish, are in the immediate vicinity. Authorities claim to have measured music exceeding 100 decibels, but the club owner disputes the measurements and says the cichlids are housed in a separate room within the club away from the loud music.
We aren't aware of similar laws in North America or Asia. For instance, take this spectacular/outrageous Manhattan (New York) nightclub: