Stomatogastric Ganglion in Jonah Crab (IMAGE) Marine Biological Laboratory Caption The stomatogastric ganglion in the Jonah crab (Cancer borealis), tagged with GFP. This nerve cluster helps the crab chew and filter food. Credit Adam Northcutt Usage Restrictions Please use with proper credit. License Licensed content 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.