Pacific Midshipman Fish Humming (1 of 2) (image) University of Pennsylvania Share Print E-Mail Caption To attract females, male Pacific midshipman fish sound a continuous low hum for up to an hour. New findings shed light on how these creatures sustain 100 muscle contractions per second. Credit Andy Bass Lab/Cornell University Usage Restrictions In context of reporting Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.