Smelt Comparisons (IMAGE) University of California - Davis Caption Comparison of different smelts. The top left is a correctly identified delta smelt, and top right is a correctly identified wakasagi smelt. Bottom left is wakasagi that was originally thought to be a delta smelt. Bottom right is a delta smelt and wakasagi hybrid. Credit Photos at top and bottom left by Brian Mahardja/California Department of Water Resources. Photo at bottom right by Rene C. Reyes/ US Bureau of Reclamation, Fish Conservation and Culture Laboratory Usage Restrictions Provide 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.