Petrocephalus boboto (image) Pensoft Publishers Caption This is an image of Petrocephalus boboto, new species, with its electric organ discharge (EOD) below. The EOD is recorded on an oscilloscope with positive voltage at the head of the fish recorded in the upwards direction. Credit John P. Sullivan & Sébastien Lavoué Usage Restrictions CC-BY 4.0 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.