Double Take

The mouth of an adult sea lamprey captured from the Great Lakes (left) and the newly-developing mouth region of a sea lamprey transformer growing in experimental substrate at the USGS Hammond Bay Biological Station (GLSC; Millersburg, Michigan) as part of the Sea Lamprey Aquaculture and Procurement (SLAP) project. https://www.usgs.gov/centers/great-lakes-science-center/news/glsc-hosts-visiting-sea-lamprey-researchers-pacific-coast.  Photo Credit: Andrea Miehls, USGS - GLSC.