Accidentally discovered in 1934 while scientists were experimenting with sonar, sonoluminescence is the emission of short bursts of light from the implosion of bubbles formed in a liquid medium as sound waves pass through it. Scientists have since theorized that the temperatures inside the bubbles are hot enough to melt steel. In 2001, the first known instance of an animal producing light by sonoluminescence was reported. What creature exhibited such behavior? Discuss
Source: The Free Dictionary