It’s tempting to simply view fish scales as armor, but there’s more to them than that. They provide camouflage; they also play a role in locomotion. For scientists working on the recovery of American Shad in the Connecticut River, scales provide a record of a fish’s life history and a way to measure the success of restoration efforts.
American shad is our largest river herring. The males, called bucks, run up to six pounds. The females, or row shad, up to four. Like their cousins alewife and blue-backed herring, shad are anadromous, spending most of the year in the ocean, then running up fresh water rivers like the Connecticut in spring to spawn. » Continue Reading.