Danionella cerebrum, a tiny freshwater fish from Myanmar, is remarkable for its ability to produce sounds exceeding 140 decibels, louder than a jet engine or gunshot. Scientists have discovered that it generates these loud sounds using a unique mechanism involving its ribs and swim bladder, likely aiding communication in murky waters where visibility is poor. Additionally, its transparent body and small brain offer a unique opportunity for detailed neuroscience studies, combining physiological complexity with scientific application, attracting researchers worldwide.